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Compaq my computer power supply fun does not rotate , the machine cant boot but the board shows some power

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Without a visual inspection it sounds like the PSU is damaged, it is possible that the standby power is reaching the motherboard but the main circut is bust. i would replace the PSU with one of the same watt rating.

Be aware that incorrectly installing a power supply can cause damage to other componets or yourself. If in doubt see professional advice

Posted on Jun 20, 2008

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Manufacturer of Compaq Evo Motherboard


open it up and the mother board manufacturer will be printed on the board
any mother board can be used as a replacement and if it needs replacing update it so that a later chip can be used
it is cheaper to replace the mother board , power supply , memory, chip than to buy a new computer
and hard drives are now solid state and do not have any spinning bits to fail
talk with a computer repair shop and get ideas as to how to proceed
you will probably find that with a rebuild you will save at least 25% off the price of a new store model pc and get a better unit to boot

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Cant find motherboard pdf schematics to download and repair my pcs


The only way to find these is to poke around on the internet with .RU domains.

Feb 20, 2014 | Motherboards

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My hp computer shows a fun error whileall funs are operating and it writes that bios has detected a serious error and prevents booting


Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect/ boot up a computer 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 electrical 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 will help don

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1 Answer

2pin male connector of the motherboard (261671-001) purpose?


the switching power supplies are fun, by 2 pin plug is that from the AC side or computer side?

from AC side its easy enought to go buy another plug thought it should have come with one.

i cant remember any 2 pin plugs on the computer side and i have taken quite a few of these apart. there is a four pin plug...

wire colors,
yellow 12 volt
black ground
red 5 volt,

if the old supply was any of those colors you can desolder from the old supply and re solder it onto the new supply. if it was another color then i would suspect a random signal wire or cutout, keep you from frying yourself with the case open... try plugging up the new supply and turning on the computer if it runs why worry about it?

Jun 10, 2010 | Compaq (261671-001) Motherboard

1 Answer

Hi, My Compaq MS-6577 mother board, won't beep, won't boot. Tried switching RAMS, no help. Should I replace built-in video with a replacement? Also tried clearing the CMOS, no good either. Can anyone...


Replacing built-in video may not solve the problem. Make sure the right power is going into the board. You may try another power supply unit with only the cpu, monitor and ram connected to the board.

Nov 13, 2009 | Compaq (261671-001) Motherboard

1 Answer

Intel D945GCLF - No post, No video Signal


Sounds like your wiring isnt right on the on off power. Make sure your power supply can handle this MotherboardAdapter cables are available that allow the incorrect use of older ATX or SFX power supplies in place of an ATX12V or SFX12V power supply. Intel does not recommend the use of these cables. These cables convert a standard 1x4 peripheral connector to the ATX12V 2x2 connector. An ATX12V or SFX12V with the 2x2 connector is required for all Pentium® 4 processor based Intel® Desktop Boards. Using the 1x4 converter cables can lead to system component or power supply damage and/or boot failures. The ATX12V and SFX12V power supply design guides (http://www.formfactors.org/)* recommend a minimum of 8A at 12Volts to properly power any Pentium 4 processor based Intel® Desktop Board. Standard ATX and SFX power supplies typically provide approximately 5A of current, which is not capable of reliably powering the Pentium 4 processor based Intel® Desktop Board. And I think the motherboards going to look for a formatted hard drive wired to the motherboard It wont boot off that USB stick.

Sep 22, 2009 | Intel D945GCLF Motherboard

2 Answers

Finding the exact model number and manual for my MB


Hi there.
Is this your board>>>>>>>
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If so they are not cheap to replace, about $150+ , you may get one second hand a bit cheaper, maybe $60-80

You mentions it beeps, the beep codes described is a Video (Mono/CGA Display Circuitry) issue
this can be memory related, so take out the main power supply (the power cord) and the motherboard battery for an hour, then put back in the memory, the battery and then the power cord and try to boot up.
Post back if you need help.

Good luck

May 29, 2009 | HP Compaq Motherboard

1 Answer

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i had same thing - was power supply,,,,replaced and all fixed, now boots properly everytime

Mar 15, 2009 | ASUS A7V400-MX Motherboard

5 Answers

Faulty Power Supply?


Take off the center heat sink and check the coprocessor. I bet you find it is black as it has overheated and fried the board. From what i have heard from my other techie friends they state that the power supply puts out to much power for the board to take and as you can tell... your problem and mine with the above stated board is that we need to replace it and throw away the old one.

Dec 22, 2007 | Compaq (261671-001) Motherboard

1 Answer

I need some help form you


sounds like you have a duff PSU, it will need replacing or it will cause the system + PSU to overheat

Oct 12, 2007 | Compaq Armada M700 Motherboard w/Pentium...

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