As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE IN CKPT APPEARS TO BE COMING FROM INSTRUMENT PANEL, AREA ON COPILOTS SIDE IN THE AREA OF ADI/HSI. DOWNPOWERED A/C REMOVED COPILOTS INSTRUMENTS AND INSPECTED LIGHTING PANEL. REPLACED F/O ADI/HSI DUE TO EVIDENCE OF SMOKE. APPLIED EXTERNAL AND APU PWR. NO DEFECTS NOTED, F/O INSTRUMENTS CK OK.