Question about Compaq (157793001) 450-Watt Power Supply

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

Can i get any circurt diagam for any compaq power supply unit,

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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.

http://www.eserviceinfo.com/index.php?what=search

Posted on Sep 17, 2008

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Posted on Jan 02, 2017

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Why does on my hydro rain timer it says power off when its still plugged in? non of the sprinklers go on


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Diconnect all power to unit this allows the unit to reset includes battery .After reset check/you may have a shrt circurt in the systen

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There is no fuse that you can change and power supplies in computers are complex. They send signals out to make sure that the voltage is stable before sending the full power and other signals. Replace the whole power supply. It is the cheapest thing you can do

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I don't have the manual for 277498-011


As for the Power Supply 99% sure it is an ATX which as long as you get the same Watt as the existing you will be okay. Make sure you look at your existing connectors to see if you have a 24 pin or 20pin motherboard and 4 pin or 8 pin additional power plug (black and yellow wires) and the new power supply has matching connectors....older ATX supplies have only 20 pins, but there are converters from 20 to 24 pin available.

Watch for the new power supplies and your drive connectors as some of the new power supplies have limited ATA plugs...if you have a lot of ATA devices you might need SATA power convertor plugs or ATA splitters to get all you ATA devices up.

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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.

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1 Answer

Enternal power supply unit for a hp compaq nx7300


The part numbers for power supplies for your PC can be found HERE.

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


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?

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1 Answer

Compaq dead after power company shutdown period


Sounds like a blown fuse in the psu, replace the unit and you should be good to go.

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D3000/1 precisionpower amp mono


caution: even if you have the part to replace it be sure that you know what you're doing. Check for dc voltage at the output line before even connecting/soldering the power transistors. You might fry it again if you don't. hope this helps.

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