Recently, I went to boot up my computer. The computer turned on but I received no display on the monitor. I have replaced the graphics card and the cooling fan. I have tested the power supply on another computer and it is fine. The monitor itself works great on my other computer. I have tried reseting the BIOS by removing the jumpers from the 1-2 position and putting them into the 2-3 position then returning to default prior to restarting the computer. During this, I also removed the lithium battery for a period of 30 mins. All of this and still no display. Any ideas???