|Take all the hardware out of the case & benchtest. You should have done that in the 1st place & until you do, it's gonna take forever to determine what's causing the problem. If you can't get the system to boot outside the case, there's no point installing the hardware in the case, right? You could have saved yourself a lot of time & aggravation by benchtesting.|
All you need are the following:
- CPU w/cooling fan
- ONE stick of RAM
- video card in the correct slot
- monitor connected by VGA or DVI
- power supply
- keyboard, preferrably PS/2, not USB
If your hardware is good, you should be able to boot, get a display, then enter the BIOS by using the keyboard. You should then go to the PC Health menu & check the CPU temp to make sure it's normal. If it's too hot, remove the cooling fan, reseat it, then check the temp again. Once you're happy with the CPU temp, then you can run thru all the BIOS settings & configure them for best performance. The next step is up to you. If it was my system, I would leave it out of the case, install ALL the RAM, connect a floppy or optical drive, then run memtest86 for an hour or two. If the RAM checks out, install everything in the case & test again, but use ONLY the parts that are listed above. Don't immediately start attaching hard drives, card readers, additional cards, mouse, etc until you're sure the hardware checks out inside the case.
It may seem like a lengthy procedure, but it's better than pulling your hair out trying to figure out what's wrong.