As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A/C WILL NOT ACCEPT GROUND POWER. GROUNDED - YES. CONFIRMED FAULT. FOUND GND POWER SWITCH NOT MAKING CONTACT UPON ON POSITION (BROKEN). SWITCH PN 64AT34-7E, IPC 24-21-51-02 DOES NOT SHOW IN TRAX. NOT AVAILABLE. R&R POWER GENERATION MODULE (P5-4) REF AMM 24-21-51. OPS CHECK GOOD. GROUND POWER NORMAL. THIS CLEARS MEL 24-11C.