Question about Compaq 295364-B21 - Power Distribution Unit 16Amp High Voltage (295364B21) Power Supply

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I want to repaire a damaged power supply unit for compaq desktop computer

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First a word of warning .... the capacitors in power supply units hold their charge for an awful long time so if you must start disassembling it leave it at least a week for the voltage to dissipate.

Next ...what exactly are you trying to do inside the power supply? I have replaced fans on occassion but further than that, unless you are a qualified electronics engineer, i would question the validity of doing anything.

Why not just buy a new PSU? ...they are not expensive?

Posted on Dec 31, 2008

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1. how to test compaq 14 pin power supply 2. when i install windows it copies the window but when it restarts it gives disk error

if you want to check your hard drive for errors
you could run the chkdsk utility
click start run type cmd then type chkdsk/r/f which will scan for and attempt to repair any bad sectors and automatically fix any corrupt files on your hard drive another way of running the chkdsk utility
click start control panel administrive tools,computer management ,disk management right click on your drive select properties click tools you should see click check now click start two boxes automatically fix files and scan for and attempt recovery of bad sectors place then a tick in both boxes then select check now,start should schedule this task when restart
do not do anything while the chkdsk utility is in progress any input may damage your computer
then defragment your hard drive
also you might download and use this registry cleaner it is totally free to use
hope this helps

Jun 09, 2011 | Compaq (176763001) 120-Watt Power Supply

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Power supply to my Inspiron 1525 shows green but when I plug it into the computer, it turns off. Computer will not start at all.

possibly a bad/faulty PSU power supply unit or its leads your computer might be shutting down to protect it from damage test all the leads that are attached to your hard drive from your motherboard and all of your drives cd/dvd 3.1/2 floppy including electrical extensions or just replace them they might be bad/faulty
hope this helps

Nov 28, 2010 | Dell POWER SUPPLY Power Supply

1 Answer

How to repair power supply? it's not work. how to

I recommend you do not try to repair the switch mode power supply, Mains voltage equipment are dangerous if you do not know what you are doing.
Switch mode power supplies are not expensive to purchase, I suggest you purchase a new ATX switch mode power supply. There may not be many 120 watt available, but higher wattage power supply are more common, the mounting holes are standard.units

Aug 16, 2010 | Compaq (176763001) 120-Watt Power Supply

1 Answer


You cannot economically repair a power supply.

Unless there is a glaring burnt solder joint you have to a scope and a schematic plus access to parts.

The average cost of a replacement unit from a PC shop is less than £25

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

2 Answers

My compaq armadastation EM does not power up, it is most likely the power supply unit. the part no. i have is 228012-001, while i saw in the web other available parts listed as no. 101881-001. they look...

Compaq puts two different numbers on their parts. One is the part number used for manufacturing. There will be another number on a label somewhere on the unit that says "Compaq spares number" or similar wording. That's the number you would use if you were ordering directly from Compaq. If the spares number is the same one you are seeing on the web then you can use that part.

Apr 29, 2009 | Compaq ArmadaStation EM (101881001)...

6 Answers

Flashing Green Light on Power BESTEC Power Supply

Hi. NO, *********** board is not fried. I am not sure what the problem is but I do know how to fix it. It is usually casued by power outages (even if you have UPS supply).

1. TAKE OUT THE ELECTRICITY LEAD TO THE COMPUTER. Look inside the computer and find the bunch of wires coming from the power supply unit (the box thing at the top with the fan and all those colouted wires!).

2. Find where these wires run into a plastic connector and plug into the mother board. Unplug it.

3. Now plug the electicity lead back into the computer. The light should now stay ON.

4. Plug in the connector again... and boot up. Leave it run a while to convince it!

5. Repeat this process if it does not work first time.

This should fix your problem . It works for me when I get this problem.

Friend in Spain

Jan 10, 2009 | HP ATX-300-12Z, ATX-300-12Z Rev. CDR, HP...

1 Answer

Power Supply Unit

Hi harry_p58,

It's not really cost effective to repair power supplies such as the one that you have. You can get a new high-quality power supply at very good prices these days (which will be cheaper and more reliable than trying to bring your old one back to life)

Hope that helps,

Take care,

Nov 13, 2008 | Newton Power (NPS200PB108D) 200-Watt Power...

1 Answer

Gateway 500x Power Problem

First Thing I would suggest doing is to have an Electrician come and check out the Circuit(s) in your housr that were blowing fuses. As this is likely due to power surges and/or short circuits, and thats likely to be a fire hazzard. Not to mention that it could just as easily damage any repairs you make to your PC.

After you know your electrical lines are OK then we can start on your PC.
There are several components in your PC that are easily damaged by power surges. I will list them in order of their likelyhood to have been damaged, any one or even all of them MAY have been damaged.

Power Supply Unit
CPU (Processor)
Video Card
Ram modules

You could try replacing them one at a time Until you finally get the right ones replaced, but it might be more cost effective to take it to a certified repair facility for Gateway (Best Buy, and Circuit City are both good choices in the US)

I would have them give you an estimate before they do any repairs because if many or ALL of these components were damaged, it might be cheaper to buy a new PC.

Hope this helps

Nov 03, 2008 | Gateway 250w ATX Power Supply (6500652)...

1 Answer

Can i get any circurt diagram for compaq power supply unit..

I found this site for schematics but am interested why you'd spend the time when reasonably priced supplies are readily available from reliable vendors. I've pulled apart a few supplies and have had some luck repairing them but overall it wasn't worth the time. Switching power supplies are not the easiest to trouble shoot. Base wishes.

Sep 17, 2008 | Compaq (157793001) 450-Watt Power Supply

1 Answer

Power supply does not fit!

OK most PSU's are the same.. by that I mean as long as the output & connections match, then the size & shape don't really matter. On the PSU somewhere will be a "Wattage" rating say 250Watt... whatever.. simply obtain a standard (Usually 350Watt) PC Power Supply Unit (PSU)of the SAME or HIGHER Wattage rating & also ensuring the Mating Connector onto the MotherBoard is the same... ya be all good..

Aug 31, 2007 | Compaq (480082-001)...

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