Question No video output

May 16, 2019
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When I power on the computer, there is no output to monitors. No video on both internal graphics and video card. Lights and fans are working.

I have connected the monitor and cable to another computer and verified it works.

Can there be a faulty motherboard, CPU, RAM or power supply?

Specs:
  • Asus Z97-P
  • Intel i5-4670k
  • Corsair 1666 MHz 2x4GB
  • Cooler Master G650M (power supply)
 
May 16, 2019
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Without RAM it’s one long, two short, repeating.

With one RAM in any slot, it starts with four low-pitch beeps, then one long, three short and not repeating.

Tried with different RAM sticks.
 
Mar 19, 2019
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After testing CPU and RAM in another computer and testing another CPU and RAM in this computer I have determined the motherboard is faulty.
It can be the PSU too. More likely because of the high current, high temperatures and current spikes from the power network. A bad capacitor in the power unit can cause weird problems, check capacitors for leaks and bulbs.
 

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