PC has been freezing intermittently. Computer froze so turned it off. Now when I boot there is no VDU display nor beeps from the motherboard. Using Gigabyte GA-8S655FX Ultra m/bd. Fan on SiS655FX chip is not working. Taken it off and tested ok. Have changed PU; same problem. What switches the SiS chip fan on. Is it a m/bd fault? Any ideas anyone?
The graphic card does not have a fan. The fan that does not work is on the SiS chip. This fan works when tested off the m/bd but not when connected. Therefore it's not getting the input voltage to switch it on. Have changed the graphics card but same problem. I thgink it's the m/bd