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EMachines T2824. Does nothing but light on mainboard coming on...

\015 Got from a friend who said it suddenly died while being used. Wouldn't come back on. I tested the PSU and it was bad. With new PSU it still won't power on. The light on the motherboard (eMachines customized Intel mainboard) comes on but nothing else happens; no hard drives spinning, no power light, no hard drive light, no post beep, nothing whatsoever. Tested the power switch and it was fine. So that means either the power supply took out either the mainboard and the CPU or both when it went bad, correct? So my question is this folks, is there a way to determine whether it's a bad CPU or a bad motherboard? I hate to waste good money on another mainboard only to find out the CPU is fried also/instead. I have no other mainboard like this to test with, nor do I have another CPU like this to test with either... Also I should mention I pulled / disconnected EVERYTHING, other than the mainboard, memory and CPU (onboard video); nothing still yet. No beeps or anything...\015

Answers :

This sounds like an old system and you have replaced the power supply, did you change the little round battery on the motherboard? It may have went bad with the power supply. Unfortantly, if a power spike took out the power supply, it might have taken out the mainboard too.
CPU's RARELY Fail, replace the Motherboard

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