No display - SiS655FX Chip fan not working

  penholder 21:02 22 Nov 2010
Locked

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?

  woodchip 21:25 22 Nov 2010

Graphics card needs a new one

  penholder 21:48 22 Nov 2010

Do you mean the AGP Grahics Card needs replacing?

  woodchip 13:36 23 Nov 2010

yes

  woodchip 13:38 23 Nov 2010

ps is this where the fan is that is not working? do you have onboard graphics you could try

  woodchip 13:39 23 Nov 2010

yes

  penholder 19:54 23 Nov 2010

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

  woodchip 20:28 23 Nov 2010

Then it looks like the motherboard needs replacing; As the SIS chip drives all kinds of things on the motherboard

  penholder 20:01 30 Nov 2010

Thanks Woodchip. Logged problem with Gigabyte who have responded twice. Confirmed its a mobo problem. Can't find P4 mobos so building a new PC. Just waiting for parts to be delivered!

This thread is now locked and can not be replied to.

Elsewhere on IDG sites

Best phone camera 2017

Stunning new film posters by Hattie Stewart, Joe Cruz & more

iPad Pro 10.5in (2017) review

28 astuces pour profiter au mieux de votre iPhone