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Re: my pc won't power on
Sometimes a defective / uder rated power supply is causing this. Defective power supply cannot provide the required load leaving your motherboard on standby mode (led green light) Try and check this first by replacing the power supply . Memory is another cause so if you also have spare you can run tests.
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If all you get is a green light, and no fans, hard drive spin up, nothing on the monitor, well than, it could be that the power supply is the wrong one for your computer. Either that or the motherboard is shot.
double check on the power supply, that is probably the problem.
We need to know exactly what the problem is. check on the back of the computer. right above the ports where you plugin a PS/2 mouse there are 4 led lights there. if the last combination it will give are all green then this is a video problem. the lights on the back are actually diagnostic led lights. it would help us a lot to figure out whats wrong with the computer using the combination of those lights. however, if the capslock key doesnt respond at all when pressed that it could be the mobo.
please let me know if you have any other questions
Either the new power supply you purchased is not functioning correctly. But, assuming it is now that you are getting some form of power to your PC, it is very likely the motherboard. Whatever fried your old power supply (or it could have just been the power supply itself) most likely fried your motherboard in the process. Probably not the CPU since the MB can't even post.