I already tried moving jumper to pins 2 - 3 and the same problem appears. The only way I can see any video on the screen (and it is the BIOS screen on wich I can't press F2 or F7 or F10) is when I remove the jumper. Then after that 4 option menu, any option I take leads to the same problem: no video again.
I just noticed that it may have nothing to do with the BIOS anymore: according to the beep code of my motherboard, this is a problem with the video.
I can hear 2 long beeps with an interval of 1 sec and then a pause of 2.5 secs. This is repeated once and then my computer boots normally with no video. It happens exactly like described here (Desktop Boards — BIOS beep codes).
I already tried powering up my computer with the off board card removed but the same problem appears. Is it possible that my PROCESSOR is damaged?