Question PC turns on but will not display anything

[SeanBois]

I tried rebooting my computer today for the first time in a couple of months and everything turned on, but the monitor showed no display (everything used to work fine with the same setup). I have tried unconnecting and reconnected everything, as well as installing each piece of hardware one at a time, and clearing the CMOS, but nothing works. The Samsung monitor shows the analog symbol and then the screen goes black and a blue light flashes continuously on the bottom right corner of the screen as if it is connected but in sleep mode. The monitor works fine as I have tested it on another device (Xbox). I also cannot hear any POST beeps on startup. What steps/tests can I do to determine this problem?? Please help!

Some Specs:
Motherboard: ASROCK extreme4 Z77
CPU: intel core i7 3770
GPU: 2x Sapphire Radeon HD 7770
4 sticks of DDR3 RAM
Power Supply: Raidmax RX-700AC 700watt

 

[BeauJet]

Check for dust build up. Defiantly in the GPU as they may have dust build up.

Also clean the entire board if there's dust, dust can infact cause system failure. If you can't see or get display only on the machine, then your gpus are having issues.

 

[JohnBonhamsGhost]

try connecting to the onboard graphics and see if it posts.

 

[SeanBois]

Check for dust build up. Defiantly in the GPU as they may have dust build up.

Also clean the entire board if there's dust, dust can infact cause system failure. If you can't see or get display only on the machine, then your gpus are having issues.

There was some dust within the case, including the GPU's. Is it possible to restore the GPU's from dust build up?

 

[SeanBois]

try connecting to the onboard graphics and see if it posts.

I have and the same problem occurs

 

[JohnBonhamsGhost]

unless there was so much dust that the fans could not spin, it is unlikely the cause. and that would take a lot of dust.
since the onboard graphics port(s) in the I/O do not work, it is not the GPU causing this.

does your motherboard have any error indicator lights? if not sure, check the user manual.
that is a lower quality PSU. many people have issues with Raidmax(all series) cutting out on them or fluctuating power and causing problems.

if you want to stay with these old Ivy Bridge chipsets;
my 1st step would be to buy a better PSU. even if this system has bitten the dust you will want something better on any new setup anyway.
if still not responding, then try borrowing replacement hardwares to try and locate the actual source of the issue; different RAM, different CPU, different motherboard. one at a time.
these being such old chipsets it is usually difficult to find any associates with compatible hardware around though. if you have a local computer shop they can usually test individual hardware for you for rather cheap.

 

[DarkArmy]

I would say get your motherboard checked. I'm quite certain there iss a problem with it if there is no display.