I recently purchased brand new components to build a PC and built it. I've built a handful of systems before so I know everything is clicked into place and plugged in etc. I've rebuilt it 2 or 3 times now to make sure.
When I turn it on the fans go fast for two seconds as usual and then slow to idle speed. All I have on my display is a blue screen saying "No signal detected". Here are the specs:
ASUS G1-P7P55E barebones
Thermaltake Toughpower XT 875W (I replaced the power supply because I thought there wasn't enough power in the 480W supplied)
Intel Core i5-650 (4M Cache, 3.20 GHz)
Corsair Vengeance 2x2GB Dual Channel DDR3 PC3-12800 (1600MHz) CMZ4GX3M2A1600C9 (I'm currently trying to boot with only 1 stick in now)
MSI N560GTX-Ti Twin Frozr II/OC
Crucial RealSSD 300 128GB SATA 6Gb/s
Dell 8X DVD+/-RW Drive (USB - from my laptop - no optical drive installed)
My initial suspicions were not enough power, but now I think it is either incompatible memory (it's not on the QVL and is 1600Mhz whereas the manual mentions 1333MHz - does this really matter though?). Otherwise I think it is a faulty CPU or mobo.
There is no onboard video. I should also say that the monitor is plugged in via HDMI and not DVI (I have no DVI cable). I just tried booting without the RAM in and the fans stay at high speed. I plugged the spare stick of RAM into slot 1 and booted and the fans go slower after the 2 secs as before. I've tried booting with RAM in each of the four slots.