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Xbox Series X crash/reboot with unknown OS 0x200000000 and SMC 0xEC01 #20

Description

@Doskan

Hi,

I am diagnosing an Xbox Series X that freezes under heavy gaming load and then either reboots or powers off.

Hardware:

  • Xbox Series X, 2023 revision
  • PicoDurangoPOST firmware v0.4.1
  • XboxPostcodeMonitor v0.3.0.0
  • Connected through AARDVARK

Observed behaviour:

  • The console boots normally and repeatedly reports:
    SP 0x0301 [SP_BOOT_SUCCESS]
    CPU 0x3600 [CPU_BOOT_SUCCESS]
  • Under load, the game freezes for several seconds.
  • In one capture, the final codes before shutdown were:
    SP 0x00A8
    SMC 0xEC01
  • In another capture, the monitor reported:
    OS 0x200000000
    followed immediately by a complete reboot sequence.

The console has been tested with another PSU, fan and heatsink, and the issue remains.

Could you confirm whether SP 0x00A8, SMC 0xEC01 or OS 0x200000000 have a known meaning?

I have attached both full logs.

POST_XboxSeriesX_20260803-235602_0.3.0.0.log

seriesx.log

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