Posted 22 May 2015 - 11:15 PM
First, I would suggest resetting the motherboard's CMOS and replacing the CMOS battery with a new one.
What is the make and model number of this computer? Perhaps I can point you in the right direction by adding a link explaining how to reset yours.
After that, we'll be looking at disconnecting various hardware by trial and error until the system boots up.
If all that fails, we may be looking at a defective motherboard, but let's not jump to that conclusion too soon, Okay?
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