Thanks @Matt_Hartley. Yes, if I leave the laptop for a while (30+ minutes), it will boot up. However, it is still not charging when it loads up. And as soon as it sleeps, it can’t be restarted again for another 30+ minutes.
I noticed this time when I booted it up that the status LEDs flashed. It was all white except two. It was red/orange on the 8th and 14th flash and blue on the 16th and 20th flash. If I understand the table described at My Framework Laptop (Intel 12th Gen Intel® Core™) is not powering on, this means:
- 8th flash red: no audio board detected
- 14th flash red: start of “post code section”
- 16th flash blue: post code bit 1 = 1
- 20th flash blue: post code bit 5 = 1
I found some data about the post codes here Post code bits meaning - #5 by Usernames but i don’t know if they apply to my laptop generation. I’m also not sure how to read them.
Finally, I found at the bottom of [knowledgebase]/my-laptop-is-not-powering-on-ryQLXvQkt that there is a problem with the RTC coin cell in 11th generation laptops that could put the processor into a stuck state. I didn’t leave my laptop unplugged for long periods, but is it possible this could happen because the RTC coin cell itself is busted? I tried the steps to reset the mainboard state but that didn’t work. I’m also not sure if it would explain why the AC charger isn’t charging the battery.