Question about HP Pavilion a1440n PC Desktop

1 Answer

My computer wont turn on

So ive already found that the power supply does work. and i was wondering exactly how to use a jumper wire on the Soft Power On.

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  • HP Master
  • 5,660 Answers

This is in direct relation to an HP Pavilion a1440n desktop computer.

The Pavilion a1440n motherboard, has a 24-pin ATX main power connector.

Shown here on HP Support > Pavilion a1440n > Motherboard Specifications,

http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00590499&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=us&lang=en&product=1843644

Scroll down the page to the motherboard illustration, and the photo below it.

In the illustration, the 24-pin ATX main power connector is marked -
ATXPWR. (Right upper side. Next to the Floppy drive connector)

You can see where the 24-pin ATX main power connector corresponds, in the photo.

This is a closer look at a 24-pin ATX main power cable, it's respective connector, and the corresponding connector on the motherboard.
(Not the Pavilion a1440n motherboard that is shown)

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

The two wires you want to jump across are the Soft Power On wire, (PS_ON), and ANY Ground wire.

ALL wires with Black insulation are Ground wires.
The Green wire is the Soft Power On wire.

This is a DC circuit. A flashlight using AA, AAA, C, or D cell batteries is one example of a DC circuit.
Direct Current.

Using just one battery for an example in a flashlight, power goes from the Negative terminal of the battery, through the slide On/Off switch on the side of the flashlight, and up to the Negative side of the flashlight bulb.

Power then goes through the filament of the flashlight bulb, to the Positive terminal of the battery, completing the circuit.

By using a jumper wire from the Soft Power on wire, to ANY Ground wire, you are completing a DC circuit.
The 5 Volt Standby circuit.

When a Power Supply is plugged into power, there is a 5 Volt voltage present in the Power Supply.
By pressing the Power On button, you are making a momentary contact, which completes the 5 Volt Standby circuit.
This 5 Volts 'excites' the Power Supply, and turns the Power Supply on.

(Actually you are momentarily closing the Power On switch. The Power On switch is located inside that plastic Power On button.

The Power On switch is a Momentary Contact Switch. The two contacts touch BRIEFLY, then spring pressure moves the contacts apart.

This is an example of a generic ATX Power On switch, that I have found fit's many computers,

http://www.directron.com/atxswitch.html )

Most of the time the Ground wire (Black) that is nearest the Soft Power On wire, (Green), is the Ground wire that is used.
Just down for ease of connecting.
You can use ANY Ground wire.

Looking at the photo in the middle of the above Playtool link, you are looking at the FRONT of the connector.

Note the metal square terminal connectors, in the socket holes.

These metal square terminal connectors, connect to the power wires coming into the 24-pin connector's plastic body.
This example resemble those metal terminal connectors, except they are square in shape, while this example is round in shape,

http://www.mcmelectronics.com/product/28-9410&mybuyscid=12972124402

The power wires come in the BACK of the connector.
The power wires are insulated.

This means that to connect a jumper wire to the metal terminal connector at the end of the power wire, the jumper wire has to go pretty far down in the socket hole.

The bare end of the jumper wire, has to go down in the socket hole far enough, to touch the metal terminal connector

Looking at the photo all the way to the right, in the Playtool link, where the power wires go down into the Back of the connector, is where the jumper wire goes.

The jumper wire goes into the socket hole, WITH the power wire, and the Ground wire.
Right next to the power wire, and right next to the Ground wire.

(Green Soft Power On wire {PS_ON}, and ANY Black Ground wire)

I use a jumper wire that is insulated, just like the power wires that go into the 24-pin ATX main power cable

Approximately 3 inches long, 1/2 inch of insulation is stripped off of each end of the wire, and the wire is bent into a U-shape.

Most use a paper clip, with several winds of black electrical tape in the middle, and the paper clip is bent into a U shape.

Choice is up to you, but please read on before you begin.

The U-shaped wire/paper clip is turned upside down.
The legs of the wire, or paper clip, go down into the socket holes.
Right next to the power wire, and the Ground wire.

The 24-pin ATX main power cable is still plugged into the 24-pin ATX main power connector, on the motherboard.
(As shown in the photo to the right, in the Playtool link)

I would suggest having the Power Supply unplugged from power, then insert one leg of the jumper wire into the socket hole with the Green Soft Power On wire.

Plug the Power Supply into power.
Now BRIEFLY touch the other leg of the jumper wire, into the socket hole of ANY Ground wire.

(ALL Ground wires end in one terminal point. Doesn't matter which Ground wire you chose)

You are making a BRIEF contact. No more than 2 seconds.
(Count, 1001,..1002)

You MUST ensure that the bare ends of the jumper wire, or the ends of the paper clip, TOUCH the metal terminal pins down in the socket holes.
(Green wire socket hole, and ANY Black wire socket hole)

Otherwise you are Not making a contact.

Advisement:
There will be a spark!

Warning you in advance.
Hence you may wish to wear a protective glove, on the hand that holds the jumper wire.
You may also wish to use an insulated wire, instead of a paper clip.

However,........the voltage we are talking about here is 5 Volts DC.
Two AA, AAA, C, or D cell flashlight batteries produce 3 Volts DC.

[The Power Supply in your Pavilion is an SMPS.
Switched-Mode Power Supply.

It converts AC {Alternating Current} electricity from your household, school, or business into DC electricity. (Direct Current)

There are three main DC Voltages produced by the Power Supply.
A) 3.3 Volts. (3 point 3)
Orange insulated wires are 3.3 Volts

B) 5 Volts
Red wires

C) 12 Volts
Yellow wires

ALL Black wires are ground wires.

If you use the jumper wire on the Soft Power On wire, and a Ground wire, AND the Power Supply comes on, you have a bad Power On switch.

If the Power Supply does Not come on, you have a bad Power Supply.
No if's, and's, or but's about it.

Apologize for the length of this solution, but I wanted to make it as plain, as if I were sitting next to you explaining this.

Posted on Jul 30, 2010

  • joecoolvette
    joecoolvette Jul 30, 2010
  • joecoolvette
    joecoolvette Jul 30, 2010

    Okay, got a little carried away.

    "If the Power Supply does Not come on, you have a bad Power Supply.
    No if's, and's, or but's about it."

    You could have a receptacle that isn't providing power, also.
    The receptacle, or wall socket that your surge protector is plugged into, could be bad.

    In the Service Panel ('Circuit Breaker box'), the circuit breaker could be tripped, and need to be reset.

    If you have a Service Panel with fuses, the fuse that handles the circuit that wall socket (Receptacle) is connected to, could be burnt out.

    I have also found bad surge protectors, in that just THAT receptacle in the surge protector, that the Computer was plugged into, was no good.

    'Hmmm, surge protector LED power on light is lit.
    Monitor, printer, and router have power.'

    Testing THAT receptacle, that the Computer was plugged into with a lamp, I found THAT receptacle was bad.

    Also a brief summary:

    The 24-pin ATX main power cable IS plugged into the motherboard, for the test.

    The jumper wire is used by placing the bare ends of the jumper wire, (Or paper clip), down into the BACK of the connector, NEXT to the Green power wire, and NEXT to the Ground (Black) wire.
    Power Supply plugged into power.


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The tower nor keyboard wont come on and its pluged in


Advise, c

1) Check to make sure THE receptacle in the surge protector that the computer is plugged into, is good.
I have had a few surge protectors where just THAT receptacle was bad.

("Hmmm, monitor, router, and printer has power from the surge protector." Checked the receptacle in the surge protector that the computer was plugged into, with a table lamp, found THAT receptacle was bad)

2) Receptacle in surge protector proves to be good?
Suggest performing the test to see if the problem is the Power On switch, or the Power Supply.
(The Power On switch is located inside the plastic Power On button)

The test involves bypassing the Power On switch, by using a jumper wire on the Soft Power On, in the ATX main power cable's connector.
Has nothing to physically do with the switch itself.

Using the jumper wire the computer (Power Supply) comes on?
Problem is the Power On switch.

[ Example of a generic ATX power on switch that I have found fits many computers,

http://www.directron.com/atxswitch.html ]

Using the jumper wire the computer (Power Supply actually), does Not come on?
The problem is the Power Supply.
Replace.

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

(Green wire {PS_ON} is the Soft Power On wire. It is jumped to ANY Ground {Black} wire)

Want to know how to Properly perform the above test? Please post back in a Comment.
Also post the computer manufacturer's name, and the Model Number.
(On the back of a desktop computer next to the Windows Product Key, or up on the side of the tower)

Regards,
joecoolvette.

Nov 08, 2010 | Computers & Internet

1 Answer

Emachine ET1810 is not powering on already replaced the power supply


You may have a bad Power On switch. The Power On switch is located inside the plastic Power On button.

This is a generic ATX power on switch, that I have found works in many computers,

http://www.directron.com/atxswitch.html

Have you bypassed the Power On switch?
If you bypass the Power On switch, and the Power Supply comes on, you have a bad Power On switch.
If you bypass the Power On switch, and the Power Supply does Not come on, you have a bad Power Supply.

Sometimes a new Power Supply can be bad.
Make SURE the ATX main power cable is plugged in tightly.

(I have had an instance recently where I bypassed the Power On switch, and the Power Supply came on, but only as long as the jumper wire was in place. Remove jumper wire? Power Supply went off. Removed the jumper wire, then pressed the Power On button. The Power Supply came on )

Bypassing the Power On switch has nothing to do with the switch itself, or the wires to the switch.
A jumper wire is used in the connector for the ATX main power cable.

My sources indicate the ET1810 uses a 24-pin ATX main power cable.

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

A jumper wire is used to connect the Green wire (Soft Power On. Also abbreviated as PS_ON) to ANY Black wire. (ALL Black wires are Ground wires)

Looking at the photo to the far right, you will see the Green wire goes down into a socket hole.
This is the Back of the connector.
The jumper wire goes down into the socket hole RIGHT NEXT to the Green wire.
The jumper wire has to go down into the socket hole pretty far.
(Approximately 1/2 inch)

At the end of the Green wire is a metal terminal. The jumper wire has to go down into the socket hole, far enough to touch that metal terminal.
Same thing for ANY socket hole with a Black wire.

(The Green wire is the Soft Power On wire. It is a 5 Volt DC wire. The Black wires are Ground wires.
The jumper makes a circuit from the Soft Power On wire to a Ground wire)

The jumper wire usually preferred is a paper clip straightened out, then bent into a U-shape.
The middle of the U is wrapped with black plastic electrical tape.
This is where your fingers hold the jumper wire.

One end of the jumper wire goes down into the socket hole with the Green wire.
The other end of the jumper wire goes down into a socket hole with ANY Black wire.
The contact is no more than 2 seconds.


My sources indicate the motherboard is an ECS MCP73VT-PM
(EliteGroup)

Oct 10, 2010 | eMachines ET1810-01 PC Desktop

1 Answer

My computer won't turn on. Everything's dead.


1) Check to make sure your surge protector has power. Power On LED light is lit.

2) Check THE receptacle, in the surge protector that the computer is plugged into.
I have had a few bad surge protectors where just THAT receptacle was bad.
"Hmmm, surge protector Power On LED light is lit.
Monitor, printer, and router plugged into the surge protector have power."

Plugged a table lamp into THAT receptacle in the surge protector, that the computer was plugged into, found it to be bad.

3) Perform the test to check whether it is a bad Power On switch, or a bad Power Supply.

The Power On switch is located inside the plastic Power On button.
This is a generic Power On switch (ATX), that I have found fits many computers,

http://www.directron.com/atxswitch.html

The test involves bypassing the Power On switch. Has nothing to do with the Power On switch wires.
A jumper wire is used on your 20, or 24-pin ATX main power cable's connector.

The jumper wire goes from the Soft Power On wire, (Also referred to as PS_ON. It is a Green wire), to ANY Black wire in the main power cable's connector.

Since you didn't post what computer you have, (Computer manufacturer, and Model Number), I have to give you generic information.
It may also be, that there is no direct information available for the computer you have.

1) This is a 20-pin ATX main power cable, and it's connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

2 This is a 24-pin ATX main power cable, and it's connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

[Older computers use the 20-pin ATX main power cable. Later computers needed more power to the motherboard, hence 4 more power wires were added. 24-pin ATX main power cable ]

Computer unplugged from power, observe Anti-Static Precautions.

[ Anti-Static Precautions:
Your body carries Static electricity.
Static will fry out (Short Circuit) the hardware components inside a computer.

Computer on a table, computer unplugged from power, computer case open; TOUCH the metal frame of the open computer case.
This will relieve your body of Static.

While working on your computer your hands, and forearms should occasionally touch the metal frame.
But if you leave your computer in the middle of working on it, be SURE to Touch the metal frame again upon your return ]

If you bypass the Power On switch, and the computer comes on, (Power Supply comes on), you have a bad Power On switch.

If you bypass the Power On switch, and the computer Does Not come on, (Power Supply), you have a bad Power Supply.

The test is to use a jumper wire on the 20, or 24-pin ATX main power cable's connector.
The jumper wire connects from the Soft Power On wire, (Green), to ANY Ground wire. (ALL Black wires are Ground wires)

The 20, or 24-pin ATX main power cable is plugged into the motherboard.
The Power Supply, (Computer), is plugged into power.

Use one end of a jumper wire, to go down into the socket hole with a Green wire, and the other end of the jumper wire to go down into a socket hole, with ANY Black wire.

The jumper wire must go down into the socket hole pretty far.
The jumper wire goes down into the socket hole, right next to the wire that is already in the socket hole.

The jumper wire has to go down in the socket hole far enough, to touch a metal terminal that is on the end of the wire.
I realize that this may look complicated on 'paper', but I'm just being very detailed.

Most use a jumper wire made from a paper clip. The paper clip's diameter is thin enough to slide down into the socket hole, right next to the wire that is already in the socket hole. (And touch the metal terminal at the bottom of the wire)

The paper clip is straightened out, then bent into a U-shape.
Black plastic electrical tape is wound around the middle of the U-shape.
The taped part is what you hold onto.

The voltage for the Soft Power On wire, (Green) is 5 Volts DC.
Two D cell flashlight batteries produce 3 Volts DC.
Just in case you have reservations.

There may be a spark. Warning you in advance.
You may wish to use a glove, on the hand that holds the jumper wire.
Just make a brief contact with the jumper wire. No more than 2 seconds should suffice.

If the Power Supply comes on, you have a bad Power On switch.
If the Power Supply does not come on, you have a bad Power Supply.
No if's, and's, or but's about it.


Tell me the computer manufacturer name, and model number, and we'll see if a compatible Power Supply can be found.
Post in a Comment.

Oct 06, 2010 | Computers & Internet

1 Answer

My desktop computer wont power on


Suggest you see if the problem is the Power On switch, or the Power Supply.

(First check to see if the receptacle in the surge protector, that the computer is plugged into, has power.
Have had a few bad surge protectors, where just THAT receptacle was bad.

"Hmmm, surge protector power on LED light is lit. Monitor, printer, and router have power, that are plugged into the surge protector.

Plugged a lamp into THAT receptacle, and found it to be bad)

To test whether the Power On switch, or the Power Supply is bad, a jumper wire is used to bypass the Power On switch.

[ The Power On switch is located inside the plastic Power On button.
This is an example of a generic ATX Power On switch, that I have found fits many computers,

http://www.directron.com/atxswitch.html ]

The jumper wire is used on the 20, or 24-pin ATX main power cable's connector.
While still plugged into the motherboard.

The jumper wire connects to the Soft Power On wire, (Green), and to any Ground wire. (Black)

Example of a 20-pin ATX main power cable, and it's respective connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

Example of a 24-pin ATX main power cable, and it's respective connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

Using the jumper (Wire) to bypass the Power On switch, turns the Power Supply on?
The problem is a bad Power On switch.

Using the jumper to bypass the Power On switch, does Not turn the Power Supply on?
The problem is a bad Power Supply.

There is a correct procedure for performing this test.
Post back in a Comment if you wish to know.

Regards,
joecoolvette

Sep 20, 2010 | Computers & Internet

2 Answers

My pc will not turn on at all


1) Check The receptacle in the surge protector, that the computer is plugged into.
I have had surge protectors where just THAT receptacle was bad.

"Hmmm, surge protector power on light is lit. Monitor, printer, and router, plugged into the surge protector, has power."

Upon plugging in a table lamp into THAT receptacle on the surge protector, I found THAT receptacle to be bad.
($30+ surge protectors, too!)

2) If the surge protector proves to be good, I would suggest performing a test that checks whether the Power On switch is bad, or the Power Supply, in the computer.

To expound:
Behind that plastic Power On button, is a Power On switch.
I have found this generic Power On switch fits many computers.

Just an example, to show you what a typical Power on switch looks like,

http://www.directron.com/atxswitch.html

The test involves using a jumper wire to bypass the Power on switch, to see if the problem is the Power On switch, or the Power Supply.

Using the jumper wire turns the computer on, (Power Supply on), the problem is the Power On switch.

Using the jumper wire does Not turn the computer on, (Power Supply), the problem is the Power Supply.

This is HP Support, and the main page for the HP Pavilion a705W desktop computer,

http://h10025.www1.hp.com/ewfrf/wc/product?product=435558&lc=en&cc=us&dlc=en&submit.y=4&submit.x=5&lang=en&cc=us

Go to the right side, and click on Product Information.

Now click on Product specifications, and then on -
Motherboard Specifications, MS-6577 (Giovani, Giovani2)
(Close the web survey. It's something that can be done without, IMHO)

Scroll to the bottom of the page, and view the motherboard photo, and the motherboard illustration.

Refer to the motherboard illustration
Look to the top right for - CONN1

Now refer to the motherboard photo, and match up CONN1.
It is a white connector on the motherboard. Has 2 rows of 10 socket holes.

The correct name for this connector on the motherboard, is a 20-pin ATX main power cable connector.

This is more information on a 20-pin ATX main power cable, it's respective connector, and the matching connector on the motherboard,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

With the side panel removed on your computer, (Computer Unplugged from power), you will see your 20-pin ATX main power cable, plugged into this connector on the motherboard.

Will resemble the photo to the far right.

[ NOTE*
Before reaching into a computer, have the power to the computer Unplugged.
Also follow Anti-Static Precautions.

Anti-Static Precautions:
Your body carries Static electricity.
Static will fry out (Short Circuit) the delicate hardware components inside a computer.

Relieve your body of Static BEFORE handling any computer parts, (hardware components), that you are going to install, and BEFORE you reach inside your computer.

Computer unplugged from power, computer case open, work on a table. TOUCH the metal frame of the open computer case, to relieve your body of Static electricity.

Should you get up, and walk away in the middle of working on your computer, upon your return be SURE to Touch the metal frame again.

Best method is to use an ESD wrist strap, (About $6), and connect the alligator clip to the metal frame.
Electro Static Discharge ]

Observing the photo to the far right, the procedure is to use a jumper wire from the Green wire, to ANY Black wire.

The main power cable is plugged in as shown.
One end of the jumper wire goes down into the socket hole with the Green wire, and the other end goes down into a socket hole with ANY Black wire.

[ The Green wire is the Soft Power on wire. Abbreviated as PS-ON.
ANY Black wire is a Ground wire.
You are making a circuit with the jumper wire, from the Soft Power on wire, to ANY Ground wire ]

The wires that go down into the main power cable's connector, have plastic insulation on them.
At the end of Each wire is a metal terminal connector.

(They resemble this metal terminal connector,

http://www.mcmelectronics.com/product/28-9410&green=13639529671&utm_campaign=MyBuys&utm_medium=Recommendation&utm_source=prod&utm_term=28-9410

The metal terminal pin is pretty far down in the socket hole.

For this reason, you have to ensure that the jumper wire is going down in the socket hole, (Right next to the wire that is already in the socket hole), and goes down in far enough to touch that metal terminal connector.

I usually state using an insulated wire, but am now going to concede, and advise what many state to use for a jumper wire.

A paper clip.

The paper clip is straightened out, then bent into a U shape.
The center of the U is wrapped with electrical tape.

The taped part of the paper clip 'jumper wire', is then held with your fingers, and thumb.

You may also wish to don a glove, on the hand that holds the jumper wire.
There will be a spark.

The voltage is 5 Volts DC.
Two D cell batteries used in a flashlight produce 3 Volts DC.

I would lay the computer on it's side, opening up.
Easier to access the 20-pin ATX main power cable's connector.
(Won't hurt a computer to lay on it's side, and be powered up)

Computer plugged into power, insert one end of the U shaped paper clip into the socket hole with the Green wire.
Now bend the paper clip if necessary, and insert the other end into ANY socket hole with a Black wire.

Make SURE the paper clip is touching the metal terminal connectors, down in the two socket holes.

Computer comes on?
Bad Power on switch.

Computer does Not come on?
Bad Power Supply.

The Power Supply used is just an ordinary ATX style of Power Supply.
Common in over 80 percent of PC's out there, and readily available.

The Wattage is 300 Watts.

The shape, and size of the Power Supply's case is approximately,
A) 6 inches Long
B) 6 inches Wide
C) 3-1/2 inches Tall

Make sure it has a 4-pin ATX +12 Volt power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

(Also abbreviated as P4 ATX 12VX1)

Newer Power Supply's have an ATX main power cable, that it's connector can be used as a 20-pin ATX main power cable, (Which you need), or a 24-pin ATX main power cable.

This is one example of a Power Supply that will work in your computer, and is reliable, while economical,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1389575&CatId=1078

Aug 22, 2010 | HP Pavilion a705w PC Desktop

1 Answer

I have a dell dimention 5100 it was working fine this morning. But now i can turn it on.


Suggest you bypass the Power On switch with a jumper wire used on the Soft Power On of the Power Supply.

If the Power Supply comes on, you have a bad Power On switch.

If the Power Supply does Not come on, you have a bad Power Supply.

The Power On switch is located inside the plastic Power On button.
This is one generic Power On switch that I have found fits many computers,

http://www.directron.com/atxswitch.html

The jumper wire is used on the 24-pin ATX main power cable.
This is an example of a 24-pin ATX main power cable, and it's connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

Dell Support > Dimension 5100 > Technical Overview > System Board Components,

http://support.dell.com/support/edocs/systems/dim5100/en/sm/techov1.htm#wp1058472

The 24-pin ATX main power cable is plugged into the motherboard, as shown in the photo to the right, on the Playtool link.

The jumper wire is used to make a Momentary (Brief) contact, with the green wire, and ANY Black wire.

The Green wire is the Soft Power On wire.
ANY Black wire is a Ground wire.

There is a correct procedure for doing this.
The safety risk is very minimal.
The Soft Power On voltage is 5 Volts DC.
Two D cell batteries produce 3 Volts DC.

An insulated wire should be used. You may wish to wear a glove on the hand that connects the jumper wire, just for an added feeling of safety.

Should you wish to know the correct procedure, simply state so in a Comment. Believe upper right of your page.

Jun 24, 2010 | Dell Dimension 5100 (D51L1) PC Desktop

1 Answer

Wont come on at all was given to me. told it worked, but it wont come on


Suggestion is that you see if the problem is the Power On switch, or the Power Supply.

Before you begin;

Check the power coming to the computer. Make sure the power cord for the power supply, is plugged into a working receptacle.

Point in case.
I have now run into three surge protectors where just One receptacle, in that surge protector was bad.

"Hmmm, surge protector power on light is on.
Monitors, printer, and router are plugged into the surge protector, and they are receiving power. Surge protector must be good."

NOT!

Check THE receptacle that the computer is plugged into. One way is to use a table lamp, or similar device, and plug it into THAT receptacle.

The method to check whether the problem is the Power On switch, or the Power Supply, is to use a jumper on the Soft Power On.

Using the jumper the Power Supply comes on, you have a bad Power On switch.

Using the jumper the Power Supply does Not come on, you have a bad Power Supply.

The eMachines eTower 677ir desktop computer, uses a TriGem Anaheim-3 motherboard,

http://www.elhvb.com/mboards/TriGem/profile/anaheim-3/Ana3_304176.htm

You will be dealing with the 20-pin ATX main power cable connector.

Plugs into the white female 20-pin connector on the motherboard, next to the ram memory slots.

[Shown in the above link photo.

You can enlarge the photo of the motherboard, if you wish for more clarity.
Right-click on the photo of the motherboard.

In the drop down list Left-click on - Save Image As
In the small window that comes up, look down at the heading - File name:

To the right of the heading File name: is a box with
304176-360 in it.
Put your mouse cursor right after the 0 in 304176-360

Left-click twice. Type - TriGem Anaheim-3
Go below, and left-click on Save.

This should go to your My Pictures folder.
I believe 304176-360 TriGem Anaheim-3 will be easier to find than just 304176-360.

Double-click on the file name.
In the window go to the bottom, and left-click on the Zoom In icon. Looks like a magnifying glass with a plus sign in it. ( + ]

This is what a 20-pin ATX main power cable, and it's respective connector looks like,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

Viewing the photo to the far Right you will see a wire with Green insulation on it.
This is the Soft Power On wire.

ANY Black wire you see is a Ground wire.

A jumper wire is used to jump across from the Soft Power On wire, to ANY Ground wire.

The connection is a BRIEF one.
It is a Momentary Contact.

(The Power On switch is a Momentary Contact Switch)

You touch the jumper wire for no more than 2 seconds.

Viewing the photo to the far right, you are viewing the back of the connector.
The back of the connector is where the wires go in.

This is where the jumper wire goes.

One end of the jumper wire, will go down into the socket hole that has the Green wire, and the other end will go down into a socket hole with a Black wire.
(ANY Black wire. They are all Ground wires)

I use a jumper wire made from a wire, such as is used on the Power Supply power cable wires.
Same gauge (Size), and has insulation on it.

The jumper wire is approximately 3 inches long, and is bent into a U shape.
Each end of the wire has approximately 1/2 inch of insulation removed.
The bare wire ends are then twisted into a point.

The bare end of the jumper wire has to go pretty far down into the socket hole, in order to make a connection.

It goes down into the socket hole right next to the wire.

At the end of the wires that go down into the 20-pin connector, is a metal terminal. (Socket style)
The bare end of the jumper wire Must touch that metal terminal.

My method is to have the computer unplugged from power.
Insert one bare end of the jumper wire down into the Green wire socket hole. (Soft Power On)

Make Sure the bare end of the jumper wire is contacting the metal terminal.

I then plug the computer into power, and insert the other end down into ANY Black wire socket hole.

It is just a brief touch. No more than 2 seconds.

You may wish to use a glove on the hand that holds the jumper wire.
There Will be a Spark.

The Voltage is 5 Volts DC for the Soft Power On.
Two C cell flashlight batteries produce 3 Volts DC.

It isn't a real safety hazard as you can see, but I wanted you to be forewarned about the spark in advance, so you don't freak out.

If you jump the Soft Power On, and the Power Supply comes on, you have a bad Power On switch.

If you jump the Soft Power On, and the Power Supply does Not come on, you have a bad Power Supply.

(Make Sure the bare ends of the jumper wire, Touch the metal terminals, down in the 20-pin ATX main power cable connector)

The Power On switch is located inside the plastic Power On button.
This is an example of a Power On switch that I have found fits many computers,

http://www.directron.com/atxswitch.html

For any questions you may have regarding your problem, please post in a Comment.
(Believe upper right of your page)

Jun 13, 2010 | E-Machines etower 667ir PC Desktop

2 Answers

SA80 PC Desktop will not turn on. No pwer i availalbe in the computer.


First check the power cable which is giving power to the pc (you can use a tester). If it's ok then look at the smps fan. If fan not working then change your smps. In case fan is working properly then check the cpu fan. If cpu fan not working properly. Then just power your pc on carefully listen for any beeps and kindly let me know the number of beeps whether long or short and your bios model and make. So that I can help you out further.

Jun 13, 2010 | Acer Aspire SA80 (ASA80UC4603) PC Desktop

1 Answer

NEC Powermate V466 No power


billyto91, I haven't worked on an NEC Powermate V466 before, but searching the internet reveals it to be a desktop computer.

My sources do not exactly indicate whether it is a desktop unit, that the computer case resembles a 'pizza-box', or is a tower style of computer case.

This is a Service Manual I found online just now from NEC, (Free),

http://support.necam.com/mobilesolutions/hardware/Desktops/486/486man.ASP

Left-click on - Service and Reference Manual (ELSIE) for V466 Series (DT & MT)
(In blue)

This is a PDF file. May take up to 30 seconds before you see the first page. (Took 6 seconds to download for me, with a medium speed DSL connection)

The reason I posted this link, is to try to give you information on opening your computer case, and see what style of Power Supply it uses. More specifically, what main power cable the Power Supply uses.

1) Computer unplugged from power. Open the computer case. The Service Manual is less than, in that it has omitted some necessary illustrations.

Indication is, that there are two screws on the back of the computer case, that are removed. Then the cover is slid forward, and lifted off. ('Pizza-box' style)

BEFORE you reach inside, I advise observe anti-static precautions.

{Your body carries Static electricity. Static WILL fry out (Short Circuit) the hardware components inside a computer.

Computer unplugged from power, TOUCH the metal frame of the computer case.
This action will relieve your body of Static.

Should you get up, and walk away from working on your computer, upon your return Touch the metal frame again}

If you have a 20-pin ATX main power cable connector, or a 24-pin main power cable connector, there is a procedure that can be used, to see if the problem is the Power On switch, or the Power Supply.

Example of a 20-pin ATX main power cable, and it's respective connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

Scroll down further for a 24-pin ATX main power cable, and it's connector.

I'm willing to bet you have a 20-pin ATX main power cable.
Observe the photo all the way to the right.
You will see a Green insulated wire, and a lot of Black insulated wires.

The Green wire is the Soft Power On wire.
ANY Black wire is a Ground wire.

The procedure is to use a jumper wire from the Soft Power On wire, to ANY Ground wire.

(It is a little more involved than this. Should you desire to do this procedure, state so in a Comment. {Believe upper right of your page}
I will detail in length of how to do the procedure)

IF, using the jumper wire turns the Power Supply on, the problem is a bad Power On switch.

IF, using the jumper wire does Not turn the Power Supply on, the problem is the Power Supply.
(Bad Power Supply. Weak Voltage power rail)

This is an example of a Power On switch, that I have found fit's many computers,

http://www.directron.com/atxswitch.html

I realize this is a bit much all at once, if one is not familiar with computer repair.
I will answer your questions to the best of my ability, and guide you step by step if needed.

Jun 08, 2010 | NEC Computers & Internet

2 Answers

I have a HP Compaq Dc7600 sff. The computer made a popping noise and went dead. I waited a few minutes to see if it would restart. It did not restart. No power at all.


Have you checked the power supply unit of the equipment?
Is it working?
If yes, the next step would be to confirm whether the memory is healthy.
If both the memory and the power supply are working, then the problem may not be too serious, otherwise, you will need to replace and go deeper and check the status of the motherboard and the processor unit.

*Note: All drives should remain disconnected during the testing process

Mar 09, 2010 | HP Compaq dc7600 Small Form Factor PC...

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