Question about Dell HP-P2507FW Power Supply ** FREE DELIVERY ** (HPP2507FW300WB) Power Supply

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I jumped the Green/Black wire on the P1 connector and the power supply comes on along with my hard drive. I suspected the power supply was dead, but it seems that it does work. Where else can I look for why my computer won't come on? The on-off switch? How do I get to it?

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  • msheared Aug 21, 2010

    doeas it boot when you jumper the supply? and did you check all the voltages on the supply? if you go to where the pwr switch conects to the mb and pull off the wite then short out the 2 connections does the computer come on normally? lou

  • g550flyer Aug 21, 2010

    I have no idea how to do all that. Thanks for the help, though.

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Posted on Jan 02, 2017

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SOURCE: Power Problem

I recent lost power only to find that my dell pc would not power up after the power had been restored. After doing some searching at work I read that it might be a problem with the usb ports. I unplugged all of my usb devices to inspect the ports. I did not see anything out of the ordinary.

I was at a loss when I decided to try to turn it on while everything was unplugged. The machine powered up as normal. I have lost power again since that first time and the same thing worked again. I found that if it will not power up, unplug it and disconnect all usb devices. After a few minutes try to turn it on again. I think that you will find that it will power up without the usb devices plugged in. Give it a try.

I am not a pc expert, but I believe that it is pretty obvious that dell has some electrical problem with their usb ports. The large number of people complaining of this problem is evidence enough for me. I have read that many have replaced the power supply and the machine will still fail to power up.

Does anybody know if this sounds like faulty usb ports or perhaps a motherboard problem?

Posted on Jan 14, 2008

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SOURCE: On replacing a Dell Dimension 2400 power supply, I

On just one of the "long" sides of the power-connector, there is a small "lever" -- press the hinged lever, at the end the furthest away from the motherboard, to unhook the connector from the socket, and then pull.

Posted on Jun 09, 2010

  • 4 Answers

SOURCE: My Emachine C2685 using the

That normally signals motherboard or power supply. Most of the time, power supply. Try paper clip test to determine if PSU is bad. You can get a replacement for about 20 bucks

http://www.cputopia.com/emachine-480w-c-series-c2685.html

Posted on Sep 19, 2011

lars_olsson6
  • 3400 Answers

SOURCE: which power supply connectors labeled P1-P9 plug into which drives in a dell dimension 3000

http://www.pcguide.com/ref/power/sup/partsMotherboard-c.html
http://www.computerhope.com/jargon/p/p8.htm
http://www.youtube.com/watch?v=6AUTHrfGtqg
FIND A VIDEO AT YOUTUBE MAYBE YOU CAN SE HOW THE
CONNECTIONS ARE.

Posted on Jun 22, 2013

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1 Answer

System dead


Hi Fr.David
You mention '..info on BIOS..'
Is your BIOS (or anything) displaying on the screen?
If screen is also dead, then your PSU 5V (red) section is suspect.
As the fans are fanning then 12V DC (yellow) is still OK.
To check your PSU, unplug & disconnect all power connector cables (note where they go, esp the M/Board supply).
Some PSU's have a green 'signal good' wire which to test must be grounded with a paper-clip etc to black.
This tells the Power Supply Unit to start up.
Black is common negative, Yellow 12V positive, Red 5V positive.
I'm positive.
I hope your test results are not too negative. ;)
Hope this helps.
Clive.

Oct 28, 2017 | Mach Speed (MSNV-939) Motherboard

1 Answer

I have an Abit IC7-G motherboard. Machine has died with no reaction from pressing power on and reset buttons. Power cable in is OK and when connected, green light behind IDE1 socket lights up (which says...


Most obvious problem would be the power supply. The green LED only indicates that the 5V rails os working enough to power the on/off circuit on the motherboard. First disconnect everything except the mother board from power supply. Then try switching on again. If this does not work, then disconnect the power connectors from the motherboard. ON the big power connector (P1) there should be a green wire with two black wires either side. This is the power on sensor wire. Use a paper clip or similar bit if wire to short out the green wire with one of the black wires. This should start the power supply and the fan in the PSU should spin. If this does not work then the PSU is definately faulty. If it switches on when there is no load connected then it is probably only slightly faulty (not able to provide sufficient current). Since the green LED is coming on, my guess is that you have bad capacitors in the PSU (they will probably have domed tops instead of flat). Try a power supply from another PC if possible.

May 25, 2011 | Abit IC7-G Motherboard

1 Answer

Green blinking light on power supply. Computer will not power on. Power supply appears to be good because I connected black and green leads from motherboard connector with a small piece of wire, and the...


One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect your hard drive

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your ((motherboard to your hard drive)) make sure they have a secure connection and are not faulty or just replace them there probably old and faulty
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electic extensions or just replace them they are probably old and faulty a computer needs its connections to have an end so any faulty leads will end up with a computer error

hope this helps
don

Feb 12, 2011 | HP ATX-300-12Z (ATX30012ZBD) 300-Watt...

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

Died. nothing comes on, so not dead drive. switched out power supply, so not dead power supply. the switch on the front - blue led only comes on when plugged in lower right two prongs of 8 (4x4). So, tried...


short power switch pins on mother board, reset bios, short green wire to black wire on ATX connector with all drives etc.. power cables disconnected to test power supply. i suspect you have a dead motherboard.

Jun 20, 2010 | eMachines ET1161-01 PC Desktop

1 Answer

No output supply


Hello,
check the power supply independently.
First you unplug all the devices,like hard disk, cdrom, FDD, card reader and any other device that is attached to the power supply.
Next is to remove the connector from the motherboard.
The ATX motherboard power connector, shown in Figure D, uses a single P1 connector rather than a P8 and a P9 connector. This connector is keyed to prevent it from being inserted backwards.


Hold IT IN THE REVERSE POSITION.
I MEAN THE CONNECTOR SIDE FACING THE WALL RATHER THAN FACING TOWARDS YOU



77c1671.jpg


Next is to short the right pin as show below:

0f85223.gif


It is 14 and 15
From colour wires we may say Green and black wire.

Hope this help you to check the psu
Anything not clear please revert back..

Feb 18, 2010 | Hi-Pro (HP-P401W) (HPP401W) Power Supply

1 Answer

Flashing green light on back of power supply no power to unit.


You can check the power supply independently.
First you unplug all the devices,like hard disk, cdrom, FDD, card reader and any other device that is attached to the power supply.
Next is to remove the connector from the motherboard.
The ATX motherboard power connector, shown in Figure D, uses a single P1 connector rather than a P8 and a P9 connector. This connector is keyed to prevent it from being inserted backwards.


Hold IT IN THE REVERSE POSITION.
I MEAN THE CONNECTOR SIDE FACING THE WALL RATHER THAN FACING TOWARDS YOU



77c1671.jpg


Next is to short the right pin as show below:

0f85223.gif


It is 14 and 15
From colour wires we may say Green and black wire.

Hope this help you to check the psu
Anything not clear please revert back..

Jan 28, 2010 | E-Machines Bestec ATX-300-12E Rev. D 300w...

2 Answers

Pc won't power up,already tried a new power supply


Ok, While I realize you have a new power supply, and assuming it is still installed, pull the main connector from the motherboard and jump across from the green wire to one of the black wires next to it just long enough to see if the PS fan starts.If it does, then check all the wires from the MB to the front panel of your box.

If all are in their proper place, reset your bios by removing the battery for 20 minutes.

If still no joy, make sure all your memory sticks are well seated, along with all your PCI/AGP/PCI-E cards and cables for your hard drives.

If you still can't power up, replace your MB

Apr 17, 2009 | Computers & Internet

1 Answer

I need a diagram of the atx pwr connector for an ASUS P4V8X-MX


If you mean power to the devices themselves, the 4-pin connectors coming from the power supply plug in to the drives. The red wire is +5 volts, the yellow wire is +12 volts and the black wires are ground (earthing) connections. IDE hard drives and CD drives use the same connector. SATA drives may have that same connector as well, but most use a different style. SATA-ready power supplies will have 1 or more plugs available. Adapters to switch from the 4-pin IDE plug to SATA type are available for supplies that don't have the right connector.

If you are asking what power pins from the mainboard power supply connector are supplying power to specific controller parts on the mainboard, that kind of detailed information is not available. Mainboards manufacturers do not supply circuit diagrams or repair information. They simply replace any boards that fail while still covered by the warranty, and expect you wil just buy a new one if the warranty has expired.

Much information about ATX boards including the power supply cable pins is found here:

http://en.wikipedia.org/wiki/ATX

Feb 09, 2009 | ASUS P4V8X-MX Motherboard

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