I have a problem which may relate to buffman's, so I will start a separate thread.
I have four Asus P4P800 SE also X MBs and five graphics cards (two types) and EVERY COMBINATION shows NO SIGNAL briefly followed by blank screen. Monitor power light blinks. Now some MBs may be defective but four of the graphics cards work OK in other PCs.
I had some PSU issues but new PSU gives light on all MBs and also fans working, so 12v also OK.
In all cases initial message is NO SIGNAL followed by blank screen. No BIOS.
I appreciate there may be some voltage problem with some graphics cards. I am talking old hat here. Like £10 graphics cards - nothing fancy.
I know what you are doing but other people will read these threads and it becomes meaningless and confusing to them. NO SIGNAL message means that the monitor is not getting a video signal from the computer so it will then shut down and go into standby. Causes can be; faulty monitor faulty cable faulty graphics card monitor plugged into graphics card when onboard graphics are enabled.Some motherboards will allow output from onboard and separate graphics cards at the same time whereas others have to have the output set in the BIOS.