is the fan of 9800 gtx is spin or not also check the pcie connector power connector must connect to graphic card to show the display + also check the card is not overheating do some dust clean off from card and replace the thermal paste too
It was in the 660's bag and in a closet. I had cleaned and re-applied arctic silver 5
Anyways, I loosened the heatsink a little and gave it one more go and I got a signal. I started in safe mode and had picture. I restarted to normal and it had signal. But about 20 seconds after windows opened I lost again.
So took it back= out, took off heatsink and cleaned thermal compound off and re-applied again and then put heatsink on but this time didnt tighten it down as much and to my surprise it now works.
Im assuming it was tightened to much and something was flexing and losin connection, or was overheating somehow due to overtighting?