I would consider a bad motherboard based on the various issues you have 
encountered.

Tom Mayer

[log in to unmask] wrote:
> I have an E-Machines T6420 with a 16x pcie slot that doesn't seem to be 
> working,i replaced the cpu and power supply and cmos battery after finding out that 
> my processor and fan were not working and getting the message no signal on my 
> monitor,then i swapped the video card with a brand new pcie video card.
> Any suggestions how to check the slot itself for working?   
>
>               
>
>   

               The NOSPIN Group Promotions is now offering
                 our special coffee mugs and mouse pads
              with the PCBUILD logo...  at a great price!!!
             http://freepctech.com/goodies/promotions.shtml