I am afraid I have bricked my laptop and don't know how to fix it

So a few days ago I opened my laptop to clean the fans, unplugging the battery first, and after putting it all back together again it seemed fine. Then yesterday I first get a crash with the stop code: clock_watchdog_timeout (0x101). I restarted my laptop and again everything seemed to work but I wanted to look into it and try and prevent it from happening again. Today I have booted into safe mode and run ddu in an attempt to reinstall fresh drivers but now my laptop wont boot at all. After a few attempts at rebooting it tried to run a self diagnostic but couldn't connect to a network and failed. I then tried to boot into safe mode again and have been met with the same clock watchdog error.

Please tell me there is something I can do to fix this as I cannot afford a new system and after recent events I really need this laptop to work.