I have a customer who is having a problem with intermitent video connectivity. What is happenning is that when you hit the power on the computer sometimes it will not bring up any BIOS screen. There is power to the monitor. Originally the problem was the motherboard. Got a new board. The problem originally started before we got the new motherboard. I stripped it down to get troubleshoot the problem and suspected the motherboard because the power would go for a few seconds and then quit. The power supply voltages checked out ok and I even tried another power supply and got the same results with the video and the intermitent power to the motherboard. Tried another outlet and power cords. Since we put in the new motherboard we tried another monitor. It seem to work great for a while and then it start where it would not have any video and thena few minutes later and another reboot we would have video and see the BIOS screen.
What could this be and can anybody think of anything I have not tried? I appreciate any and all help on resolving this issue.