Computer powers on but no display after changing mobo

RushFOUR

Reputable
Mar 17, 2014
3
0
4,510
I was playing a game last night and my computer shut off completely. No blue screen, no warning, just off. My power light was flashing and I tried to turn it back on, thinking it had gone into sleep mode, and it wouldn't power back on. So I reset the PSU and tried to turn it on again, only to find that the Motherboard speaker didn't beep and the LED lights on the Motherboard flashed for a split-second and the fans began to spin, only to turn right off again. I tried to power on again, and nothing. The only time I could get that to happen was directly after resetting the Motherboard.

I took out every part and put them back on 1 by 1, and came to the conclusion that everything would spin and run smoothly except when I connected the 8 pin connecter to the CPU power slot on the Motherboard. That's when the problem would start to occur again.

I came to the conclusion that it had to be a bad Motherboard, CPU, or PSU. I borrowed some parts from some friends, which all had similar computer setups to mine, and I started swapping out parts. I connected the same exact model CPU to my Motherboard: same thing. I swapped in two different PSU's, all with higher wattage and better than my own: same thing.

So I concluded that it must be the Motherboard. I swapped out my MSI 970A-G46 for a friend's ASRock 990FX Extreme3, and got everything hooked up. I also used his CPU just to make sure, because I know for sure that his works as he just recently took it off a working PC.

When I got everything connected, I started up the computer, and everything ran perfectly. I connected all of my peripherals, and started the computer up again. Everything seemed to run fine, however I still don't get a beep from the Motherboard speaker and now there is no display on my monitor. I hooked the monitor up with 3 different cables, and hooked it to my laptop to ensure that it was not the problem.

I started off with one problem, replaced the motherboard and CPU, and now I'm having a different problem. I turn on the computer, only to find that nothing beeps and there is no display. I unseated the Motherboard, thinking it may be shorting out on the case, and held it whilst starting the computer again. This time I hear a couple of beeps, but I'm unsure if it's from the Motherboard speaker or not because it's very feint. I have unseated all of my RAM modules, and I have retried all of the CPUs and PSUs I have, and I can't get a display to work. Also, I was going to connect directly to the onboard graphics to try and troubleshoot even further, however this "new" Motherboard that I put in doesn't seem to have an onboard graphics.

Any ideas?

PC Specs:
AMD 8350 FX CPU
ASRock 990FX Extreme3 Motherboard (Swapped from MSI 970A-G46)
2x 8GB GSkillz RAM
nVidia GeForce 650 TI
Corsair CX500 PSU
 
Have your tired to OC the CPU at all? That board only has a 4+2 Phase power and the 8350 is already pushing the VRM to its limits at stock. Go into bios if you can get there and disable Turbo and see how it runs.

That board will shutdown when the CPUTIN (HWMonitor) hits 57C, no matter what CPU or voltage. For whatever Reason CPUTIN is the sensor for the VRM's on that board. So make sure temps are good and DO NOT Overclock on the board with that CPU.

I have 3 of them board in my shop and all will do that same thing when the CPU is hot. 1 with a FX6300, a FX8130p, and a Phenom II x4 960T, while the cores will be at 48C max on the 8130p and it will throttle and shutdown.