Loud, fast fan with no display on monitor

Jeremy Rosenblum

Honorable
May 25, 2013
34
0
10,540
This morning I went to turn on my computer, and the fan started spinning insanely loud and fast the second I booted it up. Normally my fans are super quiet. Also, I got no display on the monitor (Keyboard, mouse, and other USB plug ins were powered up though.) I had to leave before I could experiment further with the problem, and figured I'd deal with it when I got back. A few hours later I got back home, and still had the same problem. I opened up the case to see if anything was loose or had accumulated dust (Nothing did.) I put the lid back on the case, plugged everything back in, and powered up again. Now it's working apparently. I'm glad it's working, but does anyone know what could have caused that? I've had this computer for over a year and nothing like that has ever happened. Also, I'm worried about it happening again. Here are my specs,

Motherboard: "PEGATRON CORPORATION 2AD5 Ivy bridge Z75"
CPU: "Intel Core i5 3550"
Graphics Card: "PNY GTX 670"
RAM: 10 GB
Stock heatsync
600w compaq PSU
Windows 7
 
Solution
The fast fan is caused by the BIOS setting not starting properly . The fan goes immediately to 100% because the BIOS is not slowing it down .

The fix.........

No idea . Possibly try resetting the BIOS by removing the mb battery for a few minutes
sounds like the gpu was not getting the power it needed to post. (gpu when they dont post right the firmware on the gpu makes the fan go to 100 percent. i would use hardware monitor and see if your bios has a health screen and watch the power supply voltages see if there stable. if they are then you be fine unless the system starts failing.