Have tried to install new graphics card but it is not giving video output.
My computer is a Thinkcentre M58E, and the graphics card is a NVidia GeForce GT 640 2GB DX11.
When card is in, monitor provides no output. Have tried changing BIOS settings to PEG/PCI, this gives a black monitor screen. Same black screen when VGA is plugged into motherboard or graphics card. PCI/PEG setting also gives black screen, but motherboard fan turns very quickly and noisily. Have tried disabling integrated graphics on safe mode, with no difference. Also reset BIOS by removing CMOS battery, with no difference.
I can't download the driver from NVidia before card is installed; it will not go through with software installation unless it detects the card.
Have recently upgraded PSU to 400W, so there should be sufficient power to run graphics card. Card does not need connected to PSU.
Before this card, I tried fitting a NVidia GeForce GT 630 card, which gave the same issues. I presumed the card was at fault but after trying with new one, I think problem lies elsewhere.
Should add that my computer runs Windows 7 32-bit.
Edited by rkpl45, 03 July 2015 - 08:43 AM.