MSI Z77A / ASUS GTX980 Strix Suddenly will not boot

[trashbat]

Hi all,

I was using my PC with no issues last night, however have come to turn it on this afternoon and it appears to be more or less dead bar the GPU had two solid blue lights (as per usual)
First off I checked all the cables were sat properly just in case which they all seem to be. I removed the gpu and tried to boot without it connected, still nothing.
I checked the PSU as per https://www.youtube.com/watch?v=5FWXgQSokF4 and the PSU fans whir away the onboard lighting comes on and the internal fans start up.
I then reset the CMOS once with the GPU connected, then again without it connected.

Even stranger when I reset the CMOS the solid blue lights on the GPU now flash. If I disconnect the power to the GPU the lights then flash red.

Bit stuck as to what to do here bar replace the mobo so I assumed I'd ask one of the knowledgable people on here before going to a repair shop/replace mobo.

Thanks in advance.

 

[Satan-IR]

I think those LEDs near the PCIE power connectors should be solid white (or blue as you put it).

If they're red it means they are no plugged in properly. Solid white means they're plugged in and receiving power. Blinking means there's problem.

I'd say the PSU might be faulty or failing. Can you test the system with another PSU?

What is your PSU, exact brand and model? What are other system specs?

 

[trashbat]

On closer inspection they are definitely white my bad.

Ahh ok, yeah it's fairly old now to be honest, the PSU make model is: Antec TP3-550. CPU: Intel Core i5-3570K. Crucial Ballistix RAM (2x8GB)

I did try out the trick highlighted in this video and all the lights and fans came on: https://www.youtube.com/watch?v=5FWXgQSokF4

Thanks for the reply!

 

[Satan-IR]

That is a really demanding card in terms of power. That PSU (being old too) might not be able to feed it anymore.

Check the PSU to see if it can power system up with GPU PCIE power cables unplugged and using the CPU integrated graphics through motherboard.

 

[trashbat]

Ahh ok, seems weird it's been working fine for absolutely ages, this has just suddenly after going into sleep the other night.

No if I unplug the GPU and try to power up the system nothing happens. The only thing that I've done which saw the PSU fire up was using the paper clip to link the green /black wires in the video I posted above.

 

[Satan-IR]

Yes that's the point, it has worked for ages and it was not the best to begin with. That's how PSUs usually retire; no prior notice or anything.

Yes it might turn on but it might not be able to provide the system with required volts at required amps.

Maybe I need to reword that part about GPU.

Unplug system from wall outlet. Turn PSU off with the switch. Take the GPU out of the slot after you unplug the PCIE power connector. Connect your monitor to the motherboard (I think it has HDMI and DVI). See if the PSU can power the system without the GPU in the slot.