Hello!

This is my first post here.

Recently i repaired my costumers a1708, 820-00875. Where U3200 was in short, it got replaced, device started working again without problems. Fastforward 4 months and it has problems with booting.

Sometimes it shows apple logo, is stuck, then shows a crash screen
Sometimes it just boots normally

It wont allow me boot externaly, Tried 3 diffrent osx, Bigsur, Monterey, Ventura.

From what i gather i assume bios is corrupted, but what programmer do i use? where do i begin? Any help is welcome...

Re: New Members - please post your introductions here

Hello!

Re: Lenovo S145-15IIL Boardview and Schematic

Thank you!