Cpu fan moves & stop No Display - Intel 845GE Motherboard

This could be a dead cpu.

It seem that changing the mother board was needed to confirm as there seems to be a problem related to non communication of the mother board with the CPU, RAM and sections.
Swap and confirm.

I suspect that your cooling fan has stopped working or the sealing mating between the fan surface and the CPU is not intact. These fans quit working because dirt and grime gets into the fan shaft and friction slows the fan . also if the fan gets accidentaly moved on the CPU, then this breaks the heat transfer tape between the CPU. This over heating causes the CPU to fail. Open the machine and observe if the fan is running correctly.

Most likely there is some kind of software management of the fan.
Boot to the BIOS CMOS settings, and see whether there is a "Quiet Fan" or "Q-Fan" setting (or the like) enabled.
Disable this by selecting "Fan runs always".
If you could provide the model number of the desktop, I may be able to give you more specifics.

my motherboard 945gs no display and cpu fan continus restarted .I have try with new cpu & ram. promblem not solve

Ur pc vga card problem.

Hi,

The CPU Fans, once they stop, you should only replace the entire FAN assembly, as it cant be serviced individually..The coil present in the mtor should have burned, this is the common cause for the fan failure

This heatsink & fan assembly can be bought for your system from the below link

http://www.skyline-eng.com/index.cfm

Under the window: Search by Machine click the dropdown menue & choose your system
Most CPU fans come with the heatsink. Try not to buy a fan that comes with a grill over it. That slows the fan down & makes the fan work harder.
Please leave me coment,if you need further assistance
RNj VINODKUMAR

i can help with the mouse & keyboard.
go into the bios on boot screen you press DEL i think then activate the USB mouse & keyboard option then save & exit.
there will be settings for the cpu fan in there somewhere but i can't remember where sorry.

have you thought about changing the battery on the motherboard, also checking that the fan on the cpu is seated properly with enough heatsink paste as both these issues will stop the pc from booting

try to clean your video card and ram using the eraser.