Update = Issue was resolved per system exchange.
I had a system board replacement which  I detailed here . Since the replacement, my touch bar has stopped working. To be more explicit, there is no sign of life other than the touch bar being extremely hot. The capacitive keys don't light up at all. What makes this worse is that every time I want to boot into the BIOS I have to remove the battery, drain the residual power and then boot it up again.  What I have tried: * Updating the BIOS. I updated to the latest at the time of the post 1.7.1.  * Running the diagnostic test from the BIOS screen. Which returned an error code of 2000-0315 ( I guess this is related to the high temp of the touch bar)   Setup: Running Ubuntu 22.04 lts     Any help will be greatly appreciated
XPS 13 plus - Touch bar not working after system board replacement