My PC with a V266B motherboard and an AMD Sempron 2400+ processor was working fine until I tried to change the CPU frequency. When I rebooted, I got no display and then the PC started to power cycle. When it settled out to a steady-state on situation, it started an alarm, kind of like a siren and stated that the CPU fan was not working. I found out that all the fans and my Aquagate Viva water cooler from Cooler Master was also working correctly. My PC will not boot to Windows anymore but it will go to CMOS where the PC Health Status shows normal settings for everything except 0 RPM for Sysfan Speed and CPUFan Speed. So, why did the CPU fan sensor fail and how can one get it back?
Computers & Internet - Jetway - V266B Motherboard
Answers & Comments
You mean you have tried over clocking? If yes then the fan sensor and the clock speed are related. That is the reason the processor is not running and hence the coolant fan is dysfunctional. Revert back to old clock speed and it will be operational again.
I already disabled the alarm but I don't like the idea of running a long time or continuously with it disabled or no alarm capability, just in case I actually do lose the fan. Flashing BIOS might work. In fact, the motherboard manual shows how to do that. But I have to see if I have the CD with the Magic Install on it. The other way is to make a boot disc but I don't have a floppy drive. I might have to get one if I don't have the CD. In order for the CD to work, I have to re-install my OS.
But in case the BIOS upgrade doesn't work, is there an expansion card out there that will give me my alarm back?
You can actually create a bootable USB flash drive for the job.