When I turn on my computer and monitor, my monitor says "no signal". I hooked up my monitor to another computer and it worked perfectly fine. The computer is an E-Machines T-4170. I have had my Uncle take a look at it and he said that it was most likely the motherboard. He replaced the hard drive, and all video cards. So that is most likely not the problem. I am to understand that I am not the only one who has encountered this problem. I have read other topics on how to solve this problem, but I don't really know what I am doing. Money is tight, so I can't take it somewhere or ship it out. Thanks in advance for help.