SOURCE: DELL POWER SUPPLY TYPE PS-5201-5D REV.F
230 Watts.
Here are specs and replacement:
230W ATX Power Supply - PS-5201-5D - HP-233SNF ...You can also replace it with a compatible 300 W psu.
SOURCE: FAULTY POWER SUPPLY FOR LITE ON PS -5251-2DS
when connected the AC power , no DC voltage reading from the p.s.
what to do?
how can i turn it on?
SOURCE: Hp pc m7640n won't turn on and power supply light is out
OK, this can be a hard thing to fix. Most of the time, the power supply is the first thing to go on a PC. However, when you stated that the motherboards LED came on after you unpluged the PS from the motherboard, it leads me to believe that the motherboard is the issue but the power supply might be outputting higher voltages and the motherboard might be shutting down. Since the power supply is cheaper then most motherboards, I would recommend getting a new one. Check ebay for a new power supply. It should be about $20 with shipping. If the same thing happens, then you need a new motherboard...
SOURCE: printer will not turn on. power supply voltages
You should verify that your voltmeter is reading correctly. Check it against an fresh flashlight cell--it should read about 1.56 to nearly 1.6 volts. You apparently don't have an overload problem. Usually, only one voltage is the reference voltage for the voltage regulator (+5 volt?). It is entirely possible that the two supplies have a common failure. Make sure they have not been set for 220 volt AC supply.
Testimonial: "All suggestions were right on. Thanks. I was hoping that someone else had a similar problem. I think I must have two bad supplies."
SOURCE: how to know Compaq ATX
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
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