As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CA MFD INTERMITTENT IN FLIGHT. ABLE TO DUPLICATE PROBLEM BY TAPPING ON LIGHT CONTROL PANEL. FOUND BROKEN WIRE IN MFD DIMMER SWITCH. R & R CA LIGHT CONTROL PANEL IAW EMB 145 AMM 20-13-10 OPS CHECK GOOD. CA MFD NO LONGER INTERMITTENT A/C OK FOR SERVICE.