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  Wrong power supply? Seriously need help! 
 Date Written 
Rick Jul 26, 2005, 07:39am EDT Report Abuse
K7S5A, Athlon, Keyboard start "Off", CMOS (Jumpers set to reset), ATX power supply from another sys.
Here's the deal. Fairly new to this building thing, but saw a board I just had to have. Last owner never got it fired up.(Builder lack of knowledge, board probably ok). No power supply. So I looked some stuff up, (Set the jumpers etc) But I had no power supply either. Have a friend. Has an ATX. So I bring it home. Fits, but the LED pins, pwr on pins etc are new to me. Finally (Before first fire up attempt) I figured it out. (I'm 90% sure because, on first fire I got a boot screen. But I'm expecting probs, so when the CPU fan was making lots of noise, I shut down. Next attpt, sys shuts down dsply and acts like something wrong. Reset button/pwr on buttons not responding right. Shut dow. Recheck everything. Seems ok. Next attpt. CPU fan still making lots of noise, now dsply won't come on at all. Shut down, get on good 'puter, call you guys! :)
Any ideas?

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ryan derobertis Jul 27, 2005, 12:42pm EDT Report Abuse
>> Re: Wrong power supply? SERIOUSLY NEED HELP!
What is the mobo? maybe it has to do with 20 or 24pin. also i had a screwed asus mobo once, maybe this is the same one?

Fixer Jul 27, 2005, 06:49pm EDT Report Abuse
>> Re: Wrong power supply? Seriously need help!

Rick Jul 27, 2005, 07:20pm EDT Report Abuse
>> Re: Wrong power supply? Seriously need help!
Thanx for all the help. Figured it out the hard way. Turns out, the CPU fan and heat sink wasn't set exactly right onto the CPU. The noise was the fan blades hitting the restraining clip. Because it wasn't set onto the chip exactly right, I apperantly shortend out the CPU to the bottom of the heat sink. Fried the CPU. Thanx for the help anyway. $180.00 bucks down the drain! Anyone got an Athlon Duron or Intel P-3 chip for trade? :) I have a couple of good AMD K-6/2500 & 333 chips! :)

Wildwood Jul 27, 2005, 11:50pm EDT Report Abuse
>> Re: Wrong power supply? Seriously need help!
$180 ???? That board max's out at an Athlon 2400+ Don't tell me you spent $180 on an Athlon 2400+!!

Anyway, some general info on that K7S5A. I built a few systems with it back a few years ago. And an important factor is the +12v rail on your power supply. It has to have at least 15Amps. A lot of the boards won't boot otherwise. Another thing is, use DDR, not PC100/133. I know thy're supposed to take either, but some have a problem with regular SDRAM. Some of the boards have a poorly cooled north bridge/chipset. If that occurs, remove the transfer tape under the heatsink and apply transfer compound. It sets up like cement when dry and holds the heatsink on.

One of my systems is still running a K7S5A ver 5.1. It's a pretty decent gamer with a 9800pro and 512MB PC2100. But I have a good 400 watt power supply in it.

Don't be stingy with the power supply.



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