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I have a hp pavilion a705 w that powers off after about 5 seconds without POST. If the connector with the 2 yellow and 2 black wires coming out of it is not connected the computers works

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Go to Control Panel and click on PRINTERS.
Then right click on your printer and click on PROPERTIES.
Click on the MAINTENANCE tab.
Look for Auto POWER and click on it.
check to see if POWER OFF is properly set
then say OK.

Hope this helps. Bud

Posted on Jan 22, 2009

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2 Answers

Pavilion 533c wont turn on


ok take everything off the back of the HP only leave the key board, mouse and power cord, then trace your power cord to the stick that six outlets take it off that plug it directly into the wall, both the HP computer and monitor then try turning it on.

Feb 01, 2013 | HP Pavilion 533c (P9939AR#ABA) PC Desktop

1 Answer

Ms 7500


Orient the motherboard so we are both looking at it the same way;

Processor to the Top, black and white Ram Memory slots to the Right, white PCI slot, and black PCI Express x16 slot to the Left;

Above the white Ram Memory slots, is the 4-pin ATX +12 Volt power cable connector. Whitish, square, 4 socket hole connector.
General example of this power cable, and it's respective connector,

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

Right next to it is a black header.
The Front Panel header, (Panel1)
This is the pinout,

http://h30434.www3.hp.com/t5/Desktop-Hardware/HP-Pavilion-h8z-1150-Motherboard-Headers-front-panel/td-p/1266199


Scroll down to Dave G's post.

4 pins across one side, 5 pins across the other side.

The side with 4 pins has the pins numbered EVEN.
The side with 5 pins is numbered ODD.

START on the OPPOSITE side of the missing pin.
As you can see there is -> No Pin 10.
The pin on the other end is Pin 2.

Pins 2, 4, 6, and 8. No Pin 10.

Other side;
Pins 1, 3, 5, 7, and 9.

A) Pins 1 and 3 are for the HarDDrive activity LED. (Light)
Pin 1 is for the Positive ( + ) wire.
If the HDD LED is dim when the harddrive is active, switch the wires around.

2) Pins 5 and 7 are for a Reset switch, IF a Reset switch is used.

3) Pin 9 is N/C. Not Connected. Reserved for the factory

4) Pins 2 and 4 are for the Power On LED. (Light Emitting Diode)
Pin 2 is for the Positive ( + ) wire.
If the PWR LED is dim when the computer is on, switch the wires around.

5) Pins 6 and 8 are for the Power On switch.

6) No Pin 10

Also,

http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c01410074/c01410074.pdf

The above is a PDF file, Illustrated Parts and Service Map, of the HP Compaq DC5850 Desktop PC.

If it doesn't work just by clicking on it, then copy it, and paste it in your browser search bar. Then press the Enter key.

[This is a PDF file. The computer you are using now has Adobe Reader on it, which uses PDF files.

After you click on the link it may take up to 30 seconds, before the first page comes up ]

For additional questions please post in a Comment.

Regards,
joecoolvette

Oct 09, 2012 | Dell HP DC5850 MS-7500 AM2 SYSTEM BOARD

1 Answer

I have installed two diferent graphics card, #1 was MSI 5459 and #2 was a Nvidia GeForce 250. Bth ran fine afor a short period of tme #1 for a month an #2 for about 2 weeks. After these periods of time...


I don't find the MSI 5459 graphics card, William.
Am familiar with the Nvidia GeForce 250 GTS, though.

Using the GeForce GTS 250 as an example, the graphics card requires a 6-pin PCI-Express power cable, for additional power, along with the power it gets from the PCI-Express x16 slot it is in.

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

The unit is furnished with an adapter power cable, that converts 2 Molex power cables, (4-pin Peripheral power cables, actually), into 1 PCI-Express 6-pin power cable.

Note that the 6-pin PCI-Express power cable, has two Yellow wires in it.

Let's look at a 4-pin Peripheral power cable,

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

Note there is one Yellow wire, one Red wire, and two Black wires.

The Red wire is a 5 Volt wire, and not used by the adapter power cable.

The two Black wires are Ground wires, and only one is used by the adapter power cable.

The Yellow wire is a 12 Volt wire, and is used by the adapter power cable.

The 6-pin PCI-Express power cable requires TWO Yellow 12 Volt wires.
(And three Black Ground wires)

This means Two 4-pin Peripheral power cables MUST be used.

Failure to use two 4-pin Peripheral power cables, to that adapter power cable, means the GeForce GS 250 is NOT receiving enough power.

This will burn the connection at the graphics card, burn the adapter power cable connector, and burn the PCI-Express x16 slot it is sitting in.

Takes time, but will happen.

Could this be what you have done?

It also requires 150 Watts all by itself. You need more power for the rest of the computer.

(The 6-pin PCI-Express power cable is designed to provide up to 75 Watts of power. This means 75 Watts of power, also comes from the PCI-Express x16 slot, it is sitting in)

Nvidia GeForce GTS 250,

http://techreport.com/articles.x/16504

For additional questions post in a Comment.

Regards,
joecoolvette

May 20, 2012 | HEWLETT-PACKARD HEWLETT RECERTIFIED...

2 Answers

What or the color of the radio wires for in a 1993 bonneville


Use a multimeter to find the two feeds and then a 9v pp3 battery to check the speakers it thats simple .

Feb 25, 2012 | 1993 Pontiac Bonneville

1 Answer

I have a hp pavilion dv7 and the power socket has come a lose i need to know which wire goes where.....


The DC Power Jack that the AC adapter (Charger) plugs into?

Look into the DC Power Jack with a magnifying glass and light you'll see it's a center pin surrounded by a barrel. Barrel has an inside and an outside.


1) Center pin. Gold and buried down in the plastic. Connected to WHITE wire at motherboard connector.

2) Inside barrel has 4 Brass fingers.
Orient the laptop so the LED is at 12 o'clock and you'll see fingers at 12, 3, 6 and 9 o'clock.

These fingers carry the + 19 volt power to computer.
The ones at 6 and 9 o'clock do, Noon and 3 are not connected.
+19 Volt power arrives at motherboard connector on RED wire.

3. Outside barrel has six brass fingers, at 2, 3, 4, 8, 9 and 10 o'clock.
2, 3, and 4 are not used,
2, 8, 9 and 10 are the power return (common, or ground) to computer.
It arrives at motherboard on BLACK wire.

4. LED is connected to YELLOW wire and controlled by computer.
Other side of LED is jumpered to a Black wire,(Ground), outside barrel 8, 9, and 10 o'clock.

From > analog posted in an HP Support Forum.

Nov 12, 2010 | HP Pavilion dv1000 Notebook

1 Answer

My computer wont turn on


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.

Jul 30, 2010 | HP Pavilion a1440n PC Desktop

3 Answers

No Power to my motherboard (PC won't start)


NO, the problem is the Power Supply.

Weak Voltage power rail.

Drag a multimeter out, and test the power of the 12 Volt power rail.

[The Yellow wires are 12 Volts. They all connect to one 12 Volt power rail inside the Power Supply.

Connect the Positive (Red) probe lead of the multimeter to any Yellow wire.
Connect the Negative (Black) lead to ANY Black wire.
ALL Black wires are Ground wires.

If you see 11 to 13 Volts the Power Supply is good.
If you see less than 11 Volts the Power Supply needs to be replaced.

An inexpensive multimeter good enough for this test can be purchased for $5 to $12.
A multitude of store carry them. An auto parts store is but one place.

Barring using a multimeter you can use a power supply tester.
Here is but one example,

http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5250576&CatId=5471

An SMPS such as used in your HP Pavilion a6544f desktop computer, puts out three main Voltages.
(ALL are DC volts)

1) 3.3 Volts (Orange wires)
2) 5 Volts (Red wires)
3) 12 Volts (Yellow wires)

http://en.wikipedia.org/wiki/Switched-mode_power_supply

When you press the Power On button, it in turn presses against a Power On switch, located inside it.

(The Power On switch is a Momentary Contact Switch. Closes briefly, then opens up. It's spring loaded.

View this generic Power On switch. It's style is used in a multitude of computers,

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

{Granted the photo is small. You can enlarge it. Right-click on it, left-click on Save Image As, send it to your My Pictures folder. Then double-click on the file name, and in the window go to the bottom, and click on the Zoom In icon. The magnifying glass with the + sign in it}

The Power On switch case is composed of two parts.
An upper metal half, and a lower plastic half.

There is a convex shaped spring steel disk, in the lower half. The top half has a plastic post. It is this plastic post, that is pushed in by the plastic Power On button.

The plastic post pushes against the convex shaped spring steel disk, and flattens it out.

The spring steel disk outer edge makes a contact, with one of the wires leading out of the Power On switch.

The center below the convex shaped disk has another contact. This contact is connected to the other wire, coming out of the Power On switch.

When you press the Power On switch post down, it makes a contact with both wires.
When you release the Power On button, the convex shaped spring steel disk, pops back into it's normal convex shape.
All the things you never wanted to know, huh?)

Pressing the Power On switch closes a circuit for the Power Supply.
The Soft Power On.

5 Volts Standby power is always present in the Power Supply, when the Power Supply is plugged into power.
(This is what you bypassed. The Soft Power On)

The first chip on the motherboard to receive power is the BIOS chip.
{Chip and Chipset are slang terms for I.C.
Integrated Circuit}

The BIOS program is initialized.
Basic Input/Output program.

BIOS looks to see what devices are connected, does a Ram Memory count, turns the Processor on, and hands the computer over to the Operating System.
(Windows XP is one example of an O/S)

A) ALL the lights use less than 1 Watt of power.

B) EACH fan uses 2 to 3 Watts.

C) A typical Processor can use 51 to 125 WATTS.
Depends on what Processor it is.

The Pavilion a6544f comes with an Intel Core2 Quad Q6600.
It can use up to 105 Watts of power.

Sources:
1) http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01494006&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=us&lang=en&product=3757419

(HP info about 95 Watts is erroneous)

2) http://en.wikipedia.org/wiki/List_of_Intel_Core_2_microprocessors#.22Kentsfield.22_.2865_nm.29

Your Power Supply with the weak Voltage power rail has enough power to light lights, and spin Fans with the 24-pin ATX main power cable unplugged.

Continued in an additional Comment.



Jun 13, 2010 | Computers & Internet

1 Answer

Power to computer fans and processer running optical drive has unsure about hard drive . No power to back panel plugs ie usb, dvi vga audio video. As well as none to front panel card reader usb........


The +5 volt output of your power supply is dead. To confirm this, take one of the molex connectors off and measure it with a voltmeter. The red wire to ground (the black wire next to it) should read +12 volts. The yellow wire to ground (the other black wire next to it) should read +5 volts. If both of these voltages look ok, the +5 volt line could still have a problem. The easiest way to figure that out is to swap the power supply out with a known, good one. But it sure sounds like the +5 line is out.

Apr 06, 2010 | HP Pavilion a1610n PC Desktop

1 Answer

The computer turns off after about five seconds without POST


Change your power supply. Thats the most likely and cheapest solution. Need more help? Let me know. Good Luck!

Jan 21, 2009 | HP Pavilion a705w PC Desktop

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