Just changed pc case Now pc turns on but nothing happends?

hi tonight i changed over my tower case which i have done twice before! This time tho i turn on the computer and everything insides start (fans, lights etc) But My Monitor cant find a source. I have tryed it on my other monitor and same thing happends. I have removed RAM sticks(laving 1GB in), Video card (even tryed my Older video card), Hard drives replugged in the MB power cables removed the soundcard and the CD rom and still nothing! i should be getting the welcome screen then it should attempt to load up. is there something i may be missing?Just changed pc case Now pc turns on but nothing happends?
Even w/out a hard drive and CD/DVD drive, a PC should be able to beep once (OK beep), display POST (text on black background) and open BIOS menu when you press Del or F1.





If RAM or graphics card has a problem, you usually get the multiple beeps.





Be sure the 4-pin 12V ATX connector (yellow and black wires) is properly connected. Also try a CMOS reset. W/ PC unplugged, reset using the CMOS jumper pin switch on motherboard OR simply by removing CMOS battery for at least 30 sec. Then power ON PC. Press Del or F1 to open BIOS menu. Load fail-safe defaults, save and exit. PC should start normally.Just changed pc case Now pc turns on but nothing happends?
umm..not sure..if your thermal pastes has Silver in it it could be possible that you have put to much on and it's squeezed out the sides and so shorting some connections on the chip???if so clean it off and try again?????





any beeps??
Sounds like you've damaged RAM slot. Try using other slots, swap you RAM. Best thing to do is have your RAM and Graphics card checked. If they r good then it's 100% motherboard.