Porsche PCM 4.1 / MHI2_ER_POG24_P3649 (MU0983) stuck on Porsche logo after M.I.B. Fullscreen patch – recovery possible?

[username2929spec]

Hi,

I have a 2017 Porsche Panamera 971 with PCM 4.1.

Train: MHI2_ER_POG24_P3649
MU: 0983

I installed M.I.B. and created a full backup before making any changes. The backup is still available.

First I enabled Widescreen CarPlay, which worked correctly.

Afterwards I tried to enable Fullscreen/Wholescreen CarPlay through GEM. My wireless CarPlay adapter was unfortunately still connected during this process.

After applying the Fullscreen modification, the PCM would only boot to the Porsche logo.

I then inserted the M.I.B. SD card again. M.I.B. autostart actually worked and I reached the green “Running MAGIC – This will take 2–5 minutes” screen.

Unfortunately, it remained on this screen for about 15 minutes without any visible progress, so I switched the ignition off.

Since then the situation is:

• PCM permanently stuck on Porsche boot logo
• Porsche logo also remains on after switching the car off
• Power/volume button held down causes the PCM to reboot, but it returns to the Porsche logo
• M.I.B. SD autostart no longer starts
• Rear-view camera is no longer displayed (Porsche logo remains)
• Climate control and other vehicle functions still work
• PCM is still reachable via OBD diagnostics
• DTC: B201A00 – PCM software update not confirmed
• Full original M.I.B. backup from before the modifications is available, including the original IFS backup

My main question:
What is the safest recovery procedure from this state?

Can the original ifs-root-stage2 from my M.I.B. backup be restored through RCC/Telnet using a D-Link DUB-E100, even though GEM and M.I.B. autostart are no longer accessible?

Or does this state require an emergency firmware/SWDL recovery or bench/eMMC recovery?

I have ordered a D-Link DUB-E100 and I do not want to write anything else to the unit until I know the correct recovery procedure.

Any help with the correct commands/procedure for POG24 P3649 / MU0983 would be greatly appreciated.