my new computer which i had for about 1 month psu died so i got a replacement sent. i installed it to find that now the new one worked for about 3 mins all fans turned on sounded all fine but was having problems with my monitor getting signal as i was playing with the cables at the back of the monitor and my whole computer turns off...
i leave it a few mins and turn it back on and fan lights come on for a spilt second then stop and the keyboard lights stay on.
i hold down the power button for about 30 seconds then the keyboard turns off if i press the power button again flash of light no start up and keyboard is on again!
if you have any ideas please let me know!
this is my build:
ASRock Z77 Extreme 4, Intel Z77, S 1155, DDR3, SATA III - 6Gb/s, SATA RAID, PCIe 3.0 (x16), D-Sub/ DVI-D/ HDMI, ATX
Cooler Master Hyper 212 EVO, 4 Heat Pipes Direct Contact, with 120mm Quiet Fan LGA775/1155/1156/1366/AM2/AM2+/AM3/FM1
Have you checked if the monitor is broken? Maybe the outputs on your GPU or the inputs on the monitor? The cable?
Is your GPU seated correctly?
Your power supply also seems a bit weak for a high end GPU. If you can, test your PSU in another computer, and see if it works. If you can't, try switching your graphics card for a less power hungry one or if there is a switch for performance vs quietness, turn that to quiet.