Xbox One X turns on then off after 5 seconds

Hi! I have a xbox one x and ever since I replaced my thermal pads and paste it tirns on then off after 5 seconds. Ive tried: replacing thermal paste again, new fan, new power supply, new ssd. I ordered a thermal pad off of amazon and as I was waiting for it to be delivered I decided to switch out the hard drive with a ssd. It booted up to the offline update page which it is supposed to after a ssd chang. When the order arrived, I changed that. Now the issue occurs and wont stay on. Ive checked everything seeing if the motherboard has any damage or something isnt plugged in. Thanks everyone for your help!!

Should be a resistor issue, reply for advi your going to have to solder.

oh i thought the motherboard was done for. I just ended up replacing the whole board. I still have the old mobo and is it worth anything?

I dont think youd get more then 50$ for it prices vary for something specific like that a condole can sell for 90 so