(1) Remove memory from mother board and start the system if you happen to listen long beep then RAM is not working properly.
(2) Clean RAM conducting area on mother board with clean cotton cloth, put one peice of RAM and test and check the othe peice also, if working you could any sign display . Before doing all these check mother board any LED is glowing if so your SMPS is working after you turn on UPS.
(3) Check for all proper connection for all cables. Have you connected video cable of monitor to mother board VGA (it will not work because it is disabled as soon as you installed
XFX GeForce 8800 GT), your viedo output only will come through
XFX GeForce 8800 GT VGA port.
(4) If propelm persits Deassmble complete the system and reassmble & do n't connect HDD, DVD, floppy. Cehck with bare mother baord, processor, RAM (put one picese at a time) by connecting viedo cable of monitor
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