As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THERE WAS A VERY STRONG ELECTRICAL BURNING ODOR ON APU STARTING. THERE WAS NO OTHER POWER INTRODUCED, NO SMOKE NOTICED. THE PILOTS PFD DOES NOT POWER UP. REMOVED AND REPLACED PILOTS PFD IAW MM 34-60-35. OPS CHECKED GOOD IAW MM 523-0807190. ALSO, COOLING TUBE FLOWED FREE NO BURNING ODOR IN THE ACFT.