I have a Radeon HD 5850 on my computer. So my computer was working fine before I left for a year. I put the computer and GPU (in the computer) away in storage. However, when I cam back, I tried to use the computer but the computer (specifically the GPU) does not recognize the monitor if I have the GPU. I did not change the configuration at all since the last time the computer worked.
I know that my computer works without the GPU. I have removed the GPU and the computer boots all the way to Windows. It is only when I install the GPU that the monitor shows a blank (no signal detected). I have tried using HDMI as well as DVI but none of them work. I cannot even see the BIOS
I tried the memory card swap using various slots and memory cards and that didn't work.
I tried putting the GPU into another mobo slot and that didn't work.
I have tried removing the CMOS battery and left it out for 10 min and that didn't work.
I have an Antec Earthwatts 650 watt PSU so I think that it is getting enough power (it was before I left for a year).
Any suggestions on whats wrong with my GPU and how to fix it? Are there any diagnostics for the GPU I can use?