After power on Fans are running but no Videosignal, no bios startup.

Hello all,

I got the same problem but it came gradually...

In fact for a full month when I first boot the computer, the fans runs, no extra beeps, the light blinked correctly but no bios at the screeen. I remarked also that the fans run full speed doing a lot of noise. Then I stopped the computer and wait 2 minutes and then it always works correclty at the second boot with the bios screen appearing. Also, the fan calm down after 1 second with less noise. So when I start the computer and hear that the fan calm down with less noise after 1 second, I know that the computer will boot correctly. That happens always at the second try after waiting 2 minutes. But since yesterday, the fans never calm down and the noise still remains high with no Bios at the screen. I'm suspecting the Power Supply. Am I right???

Thank you for your appreciated help!

Michel

I have same problem but when i power on,there is no beep heard.mobo green led glows but there is no bios screen display. but after i shut off and then do it after some time it randomly somtimes BIOS screen and the system boots. This happens frequently and i am still unable to find the exact problem.tried everything from mem,bios chk,ground ...and now mobo is out of warranty .is it feasible to handover this now to intel.since it is out of warranty.

Fans can be driven by the power supply and is most likely why the fans run. The mother board is over 4 yrs old, and the BIOS battery may be dead. If this the case it is a simple fix, as most motherboards use a CR2032 disk type battery commonly available at stores like Wal Mart, Target, Walgreen's, Meijer’s, and even grocery stores.

Replacement is straight forward. When you do remove the old battery, allow the system to sit without the battery for a full 5 minutes. After the 5 minutes, replace the battery with the new one.


If replacing the battery does not work then the issue is more complicated. The motherboard's BIOS may have failed, you could have system memory (RAM) that has failed, the video may have failed and possibly the issue could be with the power supply.

BIOS
- When you boot the computer up does it Beep?
- How many times does it beep?
- Has their been any new hardware installed recently? New video card?

Memory
- Has any new memory been added recently?
- Is the system over clocked?
- Was the system recently subject to a static shock common in dry/cold climates?

Video
- If using an aftermarket video card, and the system was set to use a built in one (integrated video), was the system adjusted to use the new video card?


Power Supply
Although the fans are running, the issue could be the power supply. A weak power supply will run low draw items like fans and lights but will not have the ability to start the system. This issue will be especially true if there has been recent additions to the hardware such as optical drives, hard drives and USB devices that are not externally powered.

Could be 3 things Memory or CPU or Powersupply. are you getting any beeps if so how many, how long. try taking all the memory out and powering up see if it beeps if so try to put one stick of memory in at a time and see if it will boot. if you get no beeps with memory out check powersupply some PS's have a red switch on back for current input. switch back and fourth about 20 times uning a pen and set it to the right current for you location. put ram back in see if it will boot if not its trial and error of the PS and the CPU replacement and it still could be the RAM giving false readings. yea i know sounds like a ball of fun.