Question CPU light on motherboard is red after changing cpu cooler.

[rishi547]

Hi guys,

I am seriously at a loss here.
I changed from a H100i to a Kraken Elite and in the process of doing so, something went wrong somewhere.
When I turn the computer on, vram flashes orange, then the cpu light goes static red.
I have read that sometimes the motherboard wont recognise the cpu but seeing as i was using it previously how could it be that?
I have rechecked and reseated all power and connection cables. Taken the cmos battery out for 30s. Untighted and tightened the cooler. Checked the cpu for bent pins. Tried with a single stick and with two sticks of ram (i use 4). Checked that the right case fans are plugged into the cooler.

My computer wont boot, nor will it allow me to get into the bios, display isnt recognised either.

My computer specs are:
Mobo: TUF b550 plus
Cpu: 3900x
Cooler: kraken elite 360
Ram: Corsair vengeance pro 4000 4x8gb
Gpu: Gigabyte 3080ti
Psu: Corsair RM1000
Hdd: 1tb Crucial p3
and about 7 case fans.

If there is anything other info needed please let me know, and thank you for any help anyone might suggest.

 

[helpstar]

check the back of the motherboard, is the correct backplate and screws used?

 

[rishi547]

The backplate only goes one way, so I would assume so, and I am using the screws that came with the AIO.