Color coding of R18 resistor of the compaq ps-7231-6cf

max 20A fuse for output DC, 3A fuse for mains 5A max (BLUE)

A standard ATX PS won't fit in your low profile case. The plug types can be different too. Usually there's a schematic with a PS that describes the wire color of each voltage. So you could conceivably shove the pins out of one PS plugs and insert them into the different plug, or solder the wires to the correct pins, and leave the PS outside of the case.

Technical Reference Guide

For the
Compaq Deskpro EX/EXS Series of Personal Computers
pdf_27652.pdf . Section 7.2.1 3.3/5/12 VDC DISTRIBUTION

If you can see the resistor then make a note on the color rings on it. If you go to a electronic supply store and tell them what the color code is they can tell you what it is rated at.Hope this helps you. Thanks

In that case you can just remove the resistor and check its value with an ohmmeter or digital multimeter.
http://en.wikipedia.org/wiki/Ohmmeter
http://en.wikipedia.org/wiki/Multimeter

Hello Anvar, hi, to run the power supply on its own, you need to short the green wire with the black wire. (plug in the unit)
using a Volt meter, select a range of DC 50V. put the black probe of the voltmeter to any black wire, and the red probe to the ff:

red is 5V
Yellow is 12V
orange is around 3.3V
Blue is negative 12 (switch or interchange the probe to properly read 12V on the voltmeter)
White is negative 5.
Visit this site for more information:
http://en.wikipedia.org/wiki/Power_supply_unit_(computer)

REPLACEMENTS ARE HERE..http://www.calhountech.com/search/index.php?part=PS-7231-6CF...OR TRY CONTACTING COMPAQ SUPPORT AT....http://h18000.www1.hp.com/cpq-country/cpq_support.html.RICHARDM69

sir
pls dont try it your self. you should better call a repairman for it. He will if possible repair it or you would have to buy a new one.
thankyou for using fixya
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my email [email protected] I can provide a replacement for the same power supply , it's a brand new one

please provide more information... are you missing 5/12 volt supply or what? cheers