When powering on I get a no signal entering power saving mode. Had happened intermittently previously and after cycling power game would load. For the last few days it would always display no signal. Replaced video card. Still no signal. Switched hard drive. No signal. Today I replaced video cable and game loaded! It ran until the power company killed power working on the line across the street. When it came back on- no signal . Cycled power twice and it booted up. Ran about 10 minutes until power company killed power again. Now I am back to no signal. I assume something on the main board is causing intermittent detection of the video signal. Anybody else ever have this problem or have insight as to what would cause this? 
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