As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WITH MAIN PANEL LIGHTS LESS THAN FULL BRIGHT, IAS & MACH DIGITS FLICKER. ACFT GROUNDED. REMOVED & REPLACED THE AUTOPILOT MODE CONTROL PANEL IAW AMM 22-11-34. SYSTEM OPS CHECKED NORMAL, LAND VERIFY & HGS SENSOR TEST IAW AMM 34-36-00 PASSED.