PS5 EDM-033 20 second blue led, power off

[Man5on85]

Hi everyone, I have a strange problem with a PS5 EDM-033. lights up with blue LED flashing for 20 seconds and turns off.
reading the errors via UART gives me the following codes:

[*] Operation: Run Read Error Codes
[Slot #] [Date Time] [Error Code] [Priority] [Error Message]
00 01/02/2025 10:43:07 80800011 High Not found in list. Report Findings.
Click Here To Report
|-(OK 00000000 80800011 FFFFFFFF FFFF0005 10000100 2013 0036 201B 18DC:AF)
Click for TSB Information

01 01/02/2025 10:43:07 808F0001 Low Abnormal SMCU communication - SMCU communication error : Timeout - No memo
|-(OK 00000000 808F0001 FFFFFFFF FFFF0005 10000100 2157 0036 2019 18DC:C4)
Click for TSB Information

any advice on what to check?
thanks in advance