Liquid-damage A3114 M3 Air with CPU throttling (820-03286)

[sekidata]

This A3114 15" Air came in with liquid damage, mostly in the trackpad circuitry area. The damage was repaired and trackpad functionality was restored.

The machine acts completely normal except for a much lower than expected CPU speed. Using Cinebench, the machine’s CPU ranking is 1201, compared with the expected 8000. It passes Apple Diagnostics and shows no errors.

Any suggestions for troubleshooting the throttled performance?

 

[2informaticos]

Did you only work on the MLB?

Test with known good trackpad board and flex.

 

[sekidata]

Yes, only the logic board was affected. Trackpad & cable are known good parts, tested on another machine.