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Solved [Help] Red CPU light on motherboard

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Hello everyone,

Short Background: Updated the bios, decided to switch the two display ports while it was updating (silly now I think of it, but I'm impatient) but the display did not return after switching them. Waited 30 minutes until I thought the bios was updated (screen wasn't on so wanted to make sure it was installed) The CPU light on the motherboard is a still red. There is no display on either of my monitors using a display port (DP) and a HDMI cable.

Long Background: I have had my computer for a couple years or so now. I built it myself and have had no problems with it until now. I was having problems with a game, and while updating everything I decided to update the bios, since it wouldn't have been done since I built the computer. Downloaded the bios update onto a USB and then ran it from the bios. As it was running, I decided to switch the two DP on the back. As I did this the display did not return, and I didn't want to interrupt the bios update in the background. I left it for 30 minutes, thinking it was adequate enough time for the bios to update and then restarted my computer. On launch, however, the CPU indicator on the motherboard was a still red, and there was no display on my monitors. I have tried restarting and the same problem.

The computer restarts itself after a minute or so when turning on. Fans all start, then it will shut down and restart automatically but nothing changes on the display. All fans turn on, this includes the cooler fans, my GPU fans and the fans installed individually on the case. RGB works for the RAM, cooler, sound card but no RGB showing on GPU or MB.

Having now spent a while, and unable to find any problems I'm all out of ideas, and I have tried scouring the Internet but nothing that has helped me as of late.

Specifications:

CPU: I7-10700k
Cooler: Corsair H100i
RAM: Corsair 32GB 3200MHz DDR4
MB: Gigabyte Z490 Aorus Pro AX
GPU: Gigabyte RTX 2070 Super
PSU: Corsair RM850i (850w)

What I've done:

Relaid the CPU, sprayed incase of any dust and reapplied thermal paste
Checked all pins
Reset the CMOS
Double checked all MB wires for CPU
Double checked all cooler wires
Replaced RAM, and checked both individually
Removed GPU and tried MB graphics
Removed GPU and tried different PCIe slot
Tried HDMI and DP cables
Tried two different montiors


All help is appreciated.
 
Try to Flash the BIOS again using the Q-Flash Button (pic attached)
QFLASH_PLUS (Q-Flash Plus Button) Q-Flash Plus allows you to update the BIOS when your system is off (S5 shutdown state). Save the latest BIOS on a USB thumb drive and plug it into the dedicated port, and then you can now flash the BIOS automatically by simply pressing the Q-Flash Plus button. The QFLED will flash when the BIOSmatching and flashing activities start and will stop flashing when the main BIOS flashing is complete. For how to use Q-Flash Plus please visit the "Unique Features" webpage of GIGABYTE's website
 

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did you backup the bios before update
Hi Peter!

Thank you for your detailed reply. I tried the Q-flash yesterday but had no luck. Today, I tried it again today after reading there was a USB specifically for the bios and it has worked! (To be fair, it was marked on the computer as 'bios').

Ended up taking the whole computer apart today, connected nothing but the 24-pin and 8-pin connectors with the USB in the correct USB slot and it flashed for a little until it turned off. Thought I'd give it all a clean and sort out the airflow etc.

Thank you for your help, I was losing my marbles.

EDIT: I'll remember to backup the bios next time too
 
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