What was found
ARRIVAL, ACFT NO POWER SELECTED, BUT GPU AVAILABLE LIGHT, NOT SELECTED) FO TURNED BATTS ON MFD SHOWED GPU VOLTAGE AT 37.7 V INTERIOR SIDE WALL LIGHTS ON ALL LEFT HAND SIDE INOP AND SHE (FA) SMELLED A FAINT BURNING ODOR. REMOVED AND REPLACED CONTROL MODULE I.A.W EMB 145 AMM 33-21-01. OPS CHK GOOD AT THIS TIME.