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If you see no lights, hear no fans running, no disk drives running then
the problem is probably a bad power supply or motherboard. Get a quote
from your local computer shop then try the guys at:
They will fix it and ship it back by Fedex or UPS. They are very economical and good.
press F8 very after it start (just in starting mode) you will get the options for booting. Select SAFE MODE and check it will start in that. Once it is started then it will work on normal mode. If problem persists then you have to restore the windows with Window CD/DVD. If you don't want to install a fresh copy just recover the previous one.
When the CPU in the computer or laptopoverheats then it will shut down (i.e. thermal overload) and won't boot upagain until it has cooled down. If this is the problem is not fixed then theCPU will eventually fail. A faulty fan causes this problem or the fan and heat sink assembly are cloggedwith dust. Check the CPU fan to see if it spins freely, if not replace the fan. If the fan and heat sink is clogged withdust the remove the dust and make sure the vents are clear and dust free. Use acan of compressed air to do this.
Open the PC box. Check the CPU heatsink/fan for dust clogs. After that is cleaned, put a little fan blowing onto the mobo. An over heating processor acts just like this. If the BIOS were changed try to scale back a little, first. Just see if the venting solves its prob. Wont cost you anything, and it wont hurt....