Question about Compaq Presario 5005 (470014-507) PC Desktop

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It did not jump start. unlike other ATX power packs that can jump start by bridging the green cable with the black cable. please give me directives on how to jump start it.

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Compaqs have a different power supply compared to other computers. Compaq power supplys have 24-pin connectors; and if this is the case with yours, try bridging the gray cable to the ground (black) and see if that starts up.

Posted on Nov 17, 2009

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1 Answer

How do jump start a psu?


standard atx psu. green wire to ground (black wire). some require a dummy load on the 5 v rail to stay on(resistor across red to black) a 10 watt 10 to 50 ohm will do nicely

May 30, 2014 | Computers & Internet

3 Answers

How to make a pc power unit work without a motherboard?


There are two pins on the atx connector you need to bridge. You can wire a switch to the pins too if you want so you can toggle on and off. Otherwise, there is a guy on eBay (seller id: antronst) that sells a connector with the pins already bridged with a on/off switch and a resistor wired in to provide some stability for five or six dollars.
Here is a diagram. Make sure it is a standard atx power supply. Some old Dells had goofy wiring.
http://www.techpowerup.com/articles/other/22

May 16, 2014 | Intel Acbel Power Supply Supports ATX 12V...

1 Answer

My pc fells to power on


Diagnose.

Suggest start with seeing if the problem is the Power On switch, or the Power Supply.

To do this you bypass the Power On switch.
This has nothing to do with the Power On switch directly, nor it's wires.

Dell Support > Optiplex GX270 > Service Manual,

http://support.dell.com/support/edocs/systems/opgx270/SM/EN/index.htm

Click on System Board
The connector number 18 - power connector (POWER), is a
20-pin ATX main power cable, connector on the motherboard.

Number 19 for the Small Mini-Tower model motherboard.

A general example of a 20-pin ATX main power cable, and it's respective connector on the motherboard,

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


Observe the photo to the Right.
Note the Green wire, and all of the Black wires.
The Green wire is the Soft Power On wire.
ALL Black wires are Ground wires.

[NOTE*
Even if I am mistaken about the ATX main power cable, and it is a 24-pin ATX main power cable, it still has a Green - Soft Power On wire, and many Black - Ground wires.

Just like the 20-pin ATX main power cable, and it's connector on the motherboard. Scroll the above page down a little more ]

The Green wire is TEMPORARILY jumped to ANY Black wire.

The preferred jumper wire is a straightened out paperclip, bent into a U-shape.
The top of the U is wrapped a few times with black plastic electrical tape. This taped area is for your fingers, and thumb to hold onto.

Turn the U-shaped jumper wire upside down. The 'legs' are what is used.
One 'leg' goes down into a socket hole with the Green wire.
The other 'leg' goes down into a socket hole, with ANY Black wire in it.

ATX main power cable is plugged in, as shown in the photo to the Right.
Where the wires go down into this main power cable's connector, is the BACK of the connector.

The jumper wire goes down into the Back of the connector.
The leg of the jumper wire slides past the insulation, of the existing wire that is already in the socket hole.

The leg of the jumper wire MUST go down into the socket hole, far enough to touch a metal terminal, that is on the end of the wire.

Looking at the middle photo, you are looking at the tips of this style of metal connector, that is on the end of every wire, that goes in the 20-pin ATX main power cable's connector,

http://www.molex.com/molex/products/datasheet.jsp?part=active/0002081202_CRIMP_TERMINALS.xml&channel=Products&Lang=en-US

The left side in the view is the part that crimps around the insulation of the wire, and the part the U-shaped jumper wire touches.
The right side of the view, shows the tip that you see in the socket holes, shown in the middle photo.

There may be a spark when the U-shaped jumper wire touches those metal terminals. (Green wire/Black wire)
You may wish to wear a glove on the hand, that you are using for the jumper wire.

HOWEVER, the Soft Power On circuit uses 5 Volts DC.
In comparison two D cell flashlight batteries store 3 Volts DC.
The glove thing is just to make you feel safer.

The contact made is no more than 2 seconds.
The Power On switch is a Momentary Contact Switch.

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, buts, or doubt about it.

Post back with your findings in a Comment. Also post what type model it is.
Small Form Factor (SFF)?
Small Desktop?
Small Mini-Tower

The Power Supply case shape is what differs.

You may be able to use this type of Power On switch, if yours is bad. It will be part of the plastic Power On Button assembly.

(After removing the Power On Button assembly, I use warm water, (Almost hot), or a hair dryer, to soften the plastic Power On Button assembly, then replace the Power On switch )

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

Regards,
joecoolvette

Oct 11, 2012 | Dell OptiPlex™ GX270 PC Desktop

1 Answer

Hp compaq 945 dosent turn on


Bypass the Power On switch. This will tell you if the problem is the Power On switch, or the Power Supply.
Has nothing directly to do with the Power On switch, or it's wires.

A jumper wire is used on the 24-pin ATX main power cable's connector.
Jumps from the green Soft Power On wire to ANY Black wire,

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

The preferred jumper wire is a paper clip.
The paper clip is straightened out, then bent into a U-shape.
The top of the U is wrapped a few times with black plastic electrical tape.
This tape area is for your fingers and thumb to hold onto.

Turning the U-shape upside down the 'Legs' are what is used.
One leg goes down into a socket hole with the Green wire.
The other leg goes down into a socket hole with ANY black wire.
ALL Black wires are Ground wires.

The BACK of the 24-pin ATX main power cable's connector, is where the wires go into it.
The leg of the U-shaped paper clip, goes down into the socket hole with the Green wire, RIGHT NEXT TO THE WIRE.

Right next to the green insulation of the wire.
The 'leg' has to go pretty far down in the socket hole.
It has to go far down in the socket hole, and TOUCH the metal terminal at the end of the wire.

The other leg of the U-shaped jumper wire has to go down into a socket hole, with ANY Black wire in it. It also has to touch the metal terminal at the end of the Black wire, down in that socket hole.

[All wires going into the 24-pin ATX main power cable's connector, end in a metal terminal,

http://www.molex.com/molex/products/datasheet.jsp?part=active/0002081202_CRIMP_TERMINALS.xml&channel=Products&Lang=en-US

The Back of the metal terminal is the left side. The tangs on the left side, have not been crimped down on a wire yet. (Insulation)
The jumper wire touches this side.

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

The Front of the metal terminal is the right side. The opening of the metal terminals, and Front side, can be seen in the middle photo of the Playtool link,


Power Supply plugged into power; 24-pin ATX main power cable plugged into the motherboard, as shown in the photo to the far right in the Playtool link above.

The contact period of the U-shaped jumper wire is Brief.
No more than 2 seconds. The Power On switch is a Momentary Contact Switch.

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.

For additional questions please post in a Comment.

Regards,
joecoolvette

Sep 21, 2012 | HP Compaq Business Desktop dc7700 -...

2 Answers

Wont turn on


check connections and if still nothing then the power supply may need to be replaced. Not hard to do,maybe takes 10 minutes to replace one. if you do change power supply contact me and i will help you through it. Not hard to do at all.

Aug 12, 2012 | Compaq Computers & Internet

1 Answer

How do I bypass the soft power on switch on the friont of the computer


Actually it never depends k_akima

The Green - Soft Power On wire is jumped to ANY Ground wire.

Doesn't matter if it's a 20-pin ATX main power cable, or a 24-pin ATX main power cable.

If the Power Supply is an AT style, and not an ATX style, the question is redundant anyway. AT style doesn't have the Soft Power On feature.

John,
The eMachine EMonster 500a uses a TriGem - Napoli 2A motherboard,

http://www.motherboards.org/mobot/motherboards_d/Trigem/Napoli%2B2A/

The main power cable is a 20-pin ATX main power cable.
General example of power cable, and it's respective connector on the motherboard,

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

In the photo to the right, the Green wire is the Soft Power On wire.
A-N-Y Black wire you see is a -> Ground wire.

The preferred jumper wire is a paperclip straightened out, then bent into a U-shape.

Turn the U-shape upside down. The top is wrapped a few times with black plastic electrical tape. This taped area is for your fingers, and thumb to hold onto.

The 'legs' are what is used. They go down into the socket holes, in the back of the 20-pin ATX main power cable's connector.

The back of the connector is where the wires go in.
Power cable is plugged into motherboard, as shown in the photo to the far right.

One 'leg' of the jumper wire slides right down into the socket hole, with the Green wire.
Slides RIGHT NEXT TO the insulation of the green wire, and touches a metal terminal down in the bottom.

http://www.molex.com/molex/products/datasheet.jsp?part=active/0002081202_CRIMP_TERMINALS.xml&channel=Products&Lang=en-US

The tip of this female metal terminal can be seen in the middle photo.
20 metal terminals, 20 tips seen.

For this reason, the 'leg' of the jumper wire must go down into the socket hole, pretty far.
MUST touch that metal terminal.

The other leg of the jumper wire goes down into a socket hole, with ANY Black wire in it. Again, ALL Black wires are Ground wires.
(Green wire = 5 Volts, or Positive wire.
Black wire = Ground wire, or Negative wire )

The contact made is 2 seconds. The Power On switch is a Momentary Contact Switch.

Power Supply comes on you have a bad Power On switch.
Power Supply does Not come on you have a bad Power Supply.

For additional questions please post in a Comment.
Regards,
joecoolvette


Sources:

1) http://en.wikipedia.org/wiki/Computer_power_supply

Scroll down to wiring diagram.

2) AT style of main power cables,

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

3) Years of experience, my own shop, and my noodle on top.

Aug 06, 2012 | Computers & Internet

1 Answer

I triger power switch but dose not work mother board


Check to see if the problem is the Power On switch, or the Power Supply.
Bypass the Power On switch.

http://www.supermicro.com/products/motherboard/Xeon/GC-LE/P4DL6.cfm

[For the motherboard user manual;
Go to the heading, to the upper right in blue - Links and Resources.
{Don't believe we can use the Ampersand on here. Let's try & }

In the list below it click on - Motherboard Manual
Click on the blue - [ Download ] for the second file listed.
MNL - 0660 (English)
P4DL6 / P4DLR / P4DLR+ ]


The SuperMicro P4DL6 motherboard can use a 20-pin ATX main power cable, OR a 24-pin ATX main power cable.

Suggest you use a Power Supply, that has a 24-pin ATX main power cable.
Why?
A 20-pin ATX main power cable, does NOT provide enough power to the motherboard.

General example of a 20-pin ATX main power cable, and it's respective connector on the motherboard,

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

[NOTE*
Color of the connectors does NOT matter ]

General example of a 24-pin ATX main power cable, and it's respective connector on the motherboard,

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

Note the additional power wires.
3.3 Volts (Orange), 5 Volts (Red) { 2 of them }, and a Ground wire. (Black)

Which type of ATX main power cable are you using? Don't know. You haven't stated it.

For both,....look at the Green wire. This is the Soft Power On wire.
(Abbreviated as PS_ON)
A jumper wire is used to jump from the Green wire, to ANY Black wire.
ALL Black wires are Ground wires.

Go to the link with the 24-pin ATX main power cable, in it.
Look at the photo to the far right. See the Green wire?
See all the Black wires?

The preferred jumper wire is a paper clip, straightened out, then bent into a U-shape. The middle of the U is wrapped a few times, with black plastic electrical tape. This taped area is for your fingers, and thumb to hold onto.

Turn the U over. Taped middle is up. There are now two 'legs'.
These legs go down into the socket holes, of the Green wire, and ANY Black wire.

One 'leg' down into the socket hole of the Green wire, the other 'leg' down into a socket hole with ANY Black wire.
The 'leg' of the jumper wire, goes down RIGHT NEXT TO the wire already in the socket hole.

The 'leg' has to go down into the socket hole, (Next to the wire already in the socket hole), pretty far.
It has to go past the insulation of the wire, and touch a metal terminal, that is on the end of the wire.

Look at the middle photo. Here you can see the metal terminals, in the socket holes.

Again, Power Supply plugged into power. ATX main power cable plugged into the motherboard, just like the photo to the far right.
The jumper wire makes a contact of no more than 2 seconds.

(Stick the jumper wire down in the socket holes, no more than 2 seconds, then pull it out.
The ATX power on switch is a Momentary Contact Switch )

Power supply comes on? You have a bad Power On switch,

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

Power supply does NOT come on? You have a bad Power Supply.

For additional questions please post in a Comment.
Regards,
joecoolvette

Jul 01, 2012 | SuperMicro SUPER DL6 (P4DL6) Motherboard

1 Answer

Connecting jumper for start up


That would be connecting a jumper wire, from the Green wire to ANY Black wire, in the 20 or 24-pin ATX main power cable's connector.

If this problem is in direct relation to a Dell E210882 motherboard, it uses a 24-pin ATX main power cable,

http://en.community.dell.com/support-forums/desktop/f/3514/p/19298234/19565862.aspx#19565862

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

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

The Green wire is the Soft Power On wire. (Abbreviated as PS_ON)
ANY Black wire is Ground wire.

With the 24-pin ATX main power cable plugged into the motherboard, and the power supply,(Computer), plugged into power, the jumper wire is inserted into the back of the 24-pin ATX main power cable's connector.

Looking at the photo to the far right in the link, shows the ATX main power cable plugged in.
Where the wires go into the connector is the BACK of the connector.

One end of the jumper wire, goes down into the socket hole with the Green wire, RIGHT NEXT TO THE WIRE.
The other end goes down into a socket hole with ANY Black wire in it.

The end of every wire going down into the ATX main power cable connector, has a metal terminal end.
This metal terminal end is pretty far down into the connector, from the backside of the connector.
For this reason the jumper wire MUST go down into the socket hole, far enough to touch the metal terminal end.

The most widely used jumper wire is a paper clip.
The paper clip is straightened out, then bent into a U-shape. Black plastic electrical tape is applied to the center of the U shape.
This taped area is for your fingers.

(One wrap of black plastic electrical tape will insulate you from 600 Volts DC)

The 'legs' of the U-shaped paper clip then go down into the socket holes.

The voltage is 5 Volts DC.
Two D cell flashlight batteries produce 3 Volts DC.
The voltage is VERY low, but there may be a small spark.
Warning you in advance.

Power supply comes on?
You have a bad Power On switch.

Power supply does Not come on?
You have a bad Power Supply.

For additional questions, or to clarify anything I have stated, please post in a Comment.
Regards,
joecoolvette

May 29, 2011 | Dell (E210882) Motherboard

2 Answers

How to power up a compaq 243890-001 power supply without the the motherboard? Its not green to ground


Remove Power Supply
1 . Shut down your computer and unplug the power cord and all cables connected to the system.

2 . Open the computer case and disconnect all power connectors from the motherboard, drives, cards and fans.

3 . Remove the four screws that secure the power supply to the case. These screws are located on the back of the computer case, at each corner of the power supply.

Wire and Start Power Supply
1 . Switch the power supply to the "Off" (sometimes "O") setting.

2 . Insert the end of one wire from a single pole, single throw (SPST) switch into the green wire of the ATX power connector (the largest power supply connector).

3 . Insert the end of the other wire from the SPST switch into the black wire of the ATX power connector. If your power supply has two black wires, connect the SPST to the black wire directly beside the green wire.

4 . Wrap electrical tape around the ATX power connector and wires from the SPST switch to hold them in place. Make sure there is no exposed copper or silver wire from the SPST switch wires.

5 . Turn the SPST switch to the "Off" position, if not already set. Plug the power supply into the wall outlet and switch it to the "On" (sometimes "I")setting.

6 . Connect any other computer components that you wish to operate without the motherboard, such as fans, drives or cards. Turn the SPST to the "On" setting to activate the power supply.


Hope the above information will be helpful to you.
Thanks.

Dec 01, 2010 | Compaq (243890-001) 250-Watt Power Supply

1 Answer

THE COMPUTER IS NOT WOKING


Check the power cable/cord for continuity with your multimeter ok. Make sure also that the mains or power outlet is giving the right voltage. This is also done by the use of the multimeter - either analog or digital - any one at your disposal can do ok. if all work well, then the power supply unit should be removed from the system unit, connected directly with the power cord and then bridged. That is at the secondary output which connects to the system motheboard. Locate the power-on cable(normally green in colour) and bridge it with any black cable on the same row. The cooling fan at the back of the power unit should be rolling if the unit is ok. Good luck

Jun 03, 2009 | Compaq (243890-001) 250-Watt Power Supply

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