As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START "FWD EQPT VAL" EICAS AND VALVE DISCRETE LIGHT. AIRCRAFT BACK TO BLOCK AND GROUNDED BY MAINTENANCE. MAINTENANCE FOUND OVRBD VALVE C OUT, RESET CB + RUN BOTH ENGINES PER B767 AMM 71-00-00 OPS CHK GOOD. AIRCRAFT RETURNED TO SERVICE.