I moved my perfectly working computer from my bedroom to my living room and after installing all the cables (power, monitor, key, mouse, etc) back as it should be, I powered on the computer. However, instead of hearing a beep sound (I dont exactly remember this but I think there should be a beep) and the screen starting up, I got a black screen with a No Signal message. I tried rechecking all the connections again and again but nothing helped. Ive had a similar problem with another computer before but somehow after leaving the computer there for about 1-2 months, I was able to turn it on and the normal screen came up as if nothing was wrong with it (weird!). Both computers are identically build can the problem come from faulty hardware? Here are the specs:
CPU: AMD Sempron 2800+
Mobo: ASRock 939NF4G-SATA2 Geforce 6100
HD: Seagate 80Gb ATA
RAM: 512 Mb Corsair Value Pack
Monitor: 17 Philips LCD 170S6
* I later added a GeForce 6200 TC (PCI-E) card into each of the computers. The computer that Im having the problem with now didnt have any problem with the graphics card. However, the other computer had the No Signal monitor problem when I installed the graphics card. That time I tried removing the card and going back to the onboard graphics but the problem was still there until I left it sitting there for 1-2 months as mentioned before.
Sorry for the trouble and the long text. I hope you understand the situation. Thanks in advance for any help/advice on fixing the problem.