my motherboard recently went bad this is how I troubleshoot it
how to troubleshoot a PC that's powering on but no display
what it could be
bad memory
bad motherboard
bad video card
bad CPU
bad power supply
lets troubleshoot
first unplug DVD/CD Rom and HDD only need the memory and CPU for display
lets start with your video card
take out your video card get one that"s working
if still no display your video is good
memory
if you take out your memory getting a beeping sound bad memory
if no beeping sound memory good
power supply
if you take out your power supply with a working power supply get a display bad power supply if still no display power supply good
motherboard
at this point I would say bad motherboard is your problem
CPU
99% of times CPU don,t go bad
how to troubleshoot a PC that's powering on but no display
what it could be
bad memory
bad motherboard
bad video card
bad CPU
bad power supply
lets troubleshoot
first unplug DVD/CD Rom and HDD only need the memory and CPU for display
lets start with your video card
take out your video card get one that"s working
if still no display your video is good
memory
if you take out your memory getting a beeping sound bad memory
if no beeping sound memory good
power supply
if you take out your power supply with a working power supply get a display bad power supply if still no display power supply good
motherboard
at this point I would say bad motherboard is your problem
CPU
99% of times CPU don,t go bad