ACER ASPIRE T180 BOOT PROBLEM

I have an ACER ASPIRE T180 on Windows 7 ULTIMATE.

Spec : http://support.acer.com/acerpanam/desktop/0000/Acer/Asp...

Problems booting up are:

No light on the front power button,
Red Hard-drive light comes on,
CD drive functions (can still open and close tray),
CPU fan does not spin on startup,
Can hear no noise from the motherboard on boot but i do not have SPK attached,
I have changed the PSU but the same problem occurs, ive also stripped the tower down cleaned all compontents/fans with a

clean cloth,taken additional RAM i have bought out but still i get NO INPUT SIGNAL DETECTED and CHECK SIGNAL CABLE on my

monitors

I recently installed an additional graphics card, and in the BIOS settings i may of changed the primary device to the PCI EXPRESS

slot instead of the PCI slot where i have installed the new graphics card.

I now have two screens using both on-board graphics and PCI graphics connected and it still proceeds to show no signal, ive

tried a CMOS reset but i am not sure i have done it right, i have changed over jumpers with all wires unplugged and booted

system its self and also left the CMOS battery out the board but still no luck.

All help appreciated.

Thanks,