i have one CRT monitor and one LCD monitor. Using Nvidia Geforce 9600GT I have been using the CRT monitor for a very long time then suddenly the CRT monitor stops working so i bought a LCD monitor and tried it and it worked. So i put the CRT aside. One month later, the LCD monitor also stopped working with a "No input signal" when i on my PC, at first i thought the wire was damaged so i bought a new 1 and it still didn't work. So, i tried changing back to my CRT monitor and now the CRT monitor worked. After like another one month, i wanted to change back to my LCD but it still didn't work. i tried my LCD on my friend's com and it worked PERFECTLY. Can anyone tell me whats wrong with my com?