As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4003 THE CREW REPORTED EXCESSIVE STATIC OVER THE SPEAKERS WITH THE GPU AND WITH THE BATTERY ALONE. THE CREW STARTED THE APU AND NOTICED SMOKE COMING FROM THE FIRST OFFICERS PANEL. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED THE DIGITAL AUTO PANEL AND THE AUDIO CONTROL PANEL IAW EMB-145 ACFT MM 23-51-01. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.