PS3 Playstation 3 CECHG04 A0A02033 Error after reflow.

[Joel_]

The previous owner did a reflow through the housing. The Ps3 got so hot that the casing was severely deformed. I was able to get the Ps3 cheaply and would now like to restore it for my collection. When I connect the Ps3 now it does not stay in standby but beeps directly and flashes red. After reading out the syscon I only get A0A02033 error. Unfortunately, the original error code is no longer displayed because the previous owner apparently tried to start the Ps3 many times and this was then overwritten with the current one, which is why I don't know what kind of defect the Ps3 had before the failed reflow. So I replaced the SB Thermal Monitor IC. Unfortunately without success the Ps3 still has the same problem. Where could I start now? I would at least like to get it running so that if it is not repairable I at least know what is still working and can use it for parts.