Video card fan won't spin, card won't display video upon booting of computer
There are a bunch of posts on this subject, and I've read a lot of them and used the advice to guide my steps so far. At this point, however, I am still stuck, and would appreciate any tips or advice. Thanks
I first had this error a few months ago, with the system setup below. Upon turning on the computer, the video card fan would not spin, and the card itself did not display anything on the monitor. After researching this issue on forums such as this one, I went about methodically swapping out components, as you can see when you compare the two builds above.
Motherboard: MSI 870U-G55 AM3+ ATX AMD Motherboard
CPU: AMD Athlon II X3 435 Rana 2.9GHz Socket AM3 95W
Video Card: VGA XFX PVT98GYDLH 9800GT
PSU: OCZ StealthXStream OCZ600SXS 600W ATX12V / EPS12V
RAM: Kingston HyperX Blu 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800)
Hard drive: Western Digital WD Blue WD3200AAKS 320GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5"
Research led me to believe that the most likely causes of this error are faulty:
Video Card, Motherboard, CPU. Less likely but also possible could be: PSU, RAM.
First to be swapped out was the video card, switching the XFX for the Gigabyte - still no video or fan spinning. (Neither of the video cards required power connectors, FYI, and the new Gigabyte card only requires 400W, far less than my 600W PSU.) Next I replaced the motherboard on its own, with a different unit of the same exact model - again no improvement. Then I bought a new processor and motherboard, the FX4130 and MSI 970A-G46 and installed it - again no improvement. At this point I am growing slightly tired of trying new components and wanted to run this by some people to see if I should try a new PSU, or if there are alternate methods of diagnosis that I should try. The motherboard supplies the power to the video card, and here I've tried 3 different motherboards and 2 different video cards. And yet, the only components I never replaced are the PSU and the RAM. Is that something I should try? Another reason why I'm hesitant to replace the PSU is that the system fan is spinning fine. Also, the computer doesn't make any beep sounds upon booting - it seems to boot fine except that no video is displayed, and the video card fan doesn't spin.
I've read a little about a bench test, but as a non-engineer, that seems a little daunting.