Really sorry to hear. With your setup in theory you should be good at this point.
Pitool shutsdown but not the pc?
Unfortunately as it is pimax likely needs to setup a remote session to see what’s going on (Teamviewer) @Doman.Chen
You have a killer pc setup. Going to search you psu as found out awhile ago 2080ti are quite interesting. There was a reddit where it was found that a 600w power supply depending on amp specs worked better for stability than a 1000w. But don’t think this is likely a problem.