MacBook Pro M2 A2338 with PowerSupply it is running, "X" on the battery symbol and FAN is running permanently

[Schluchti45]

I have a MacBook Pro A2338 M2. The MacBook runs with the power supply unit. The fan runs permanently and the battery shows the message “Service recommended”.
I have already replaced the battery with a new one, but this has not helped. I have also tried DFU and the system restored the error remains the same.
Do any of you have any ideas where I could look or how I should proceed here?

[reformatt]

Have seen this with a damaged battery flex cable on a 2022 A2338 recently. Fan ran flat out and battery not communicating via SMBUS. The cable is identical to that used on the A1706 BTW.

Couple of keys on that one also not working and I swapped out the palmrest as well......customer later tells me that he believes a rat pissed on it. Oh thanks for telling me AFTER I've fixed it.

[mon2]

Measure the voltage to ground of each pin on the battery connector.

[reformatt]

Have seen this with a damaged battery flex cable on a 2022 A2338 recently. Fan ran flat out and battery not communicating via SMBUS. The cable is identical to that used on the A1706 BTW.

Couple of keys on that one also not working and I swapped out the palmrest as well......customer later tells me that he believes a rat pissed on it. Oh thanks for telling me AFTER I've fixed it.

[Schluchti45]

Thanks for your hints, i have ordered a new flex cable for the smbus and will check if this helps. i will also check the communication on sdl and sda. kind regards

[Schluchti45]

Hello,

my new flex cabel now arrives and i installed it. Now the MacBook is working without any problems. Thanks for your input.