During boot main light red flashes white once then flashes red, Led1 is lit, Led2 is not lit. No signal to monitor. I was using Radeon HD 6800 before, it was working fine.
Motherboard: ASRock H61M-VS
PSU: QDION QD500
Problem solved by updating bios version.
If you mean Leds on GPU board it may mean that GPU power system is not OK.
Try to reinstall GPU in PCIe slot and reconnect or change GPU power cord.
Are you using the same monitor input for new GPU?
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