As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CABIN TEMP. FWD CABIN TEMP. "FLT DECK TEMP." EICAS MESSAGE AND TEMP SELECTOR FAULT LIGHTS ALL ILLUMINATED AFTER ENGINE START. AIICRAFT BACK TO BLOCK AND GROUNDED BY MAINTENANCE. MAINTENANCE DETERMINED APU PWR TRANSFER ISSUES FIM CHECKED GOOD ON SYSTEM IAW FIM 21-61-1-1 REF TABLE 803. OPS CHECK NORMAL AT THIS TIME. AIRCRAFT REMAINS NO ETOPS. AIRCRAFT RETURNED TO SERVICE.