As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING THE OPERATIONAL CHECK EMERGENCY LIGHTING SYSTEM, DC BUS 1-2 OFF AND SHED BUSS 1-2 OFF CAUTION MESSAGE DOES NOT COME INTO VIEW ON THE EICAS. FOUND MULTIPLE BUTTONS PUSHED IN. PUT BACK INTO ORIGINAL CONFIGURATION AND PERFORMED THE EMERGENCY LIGHTS OPERATIONAL CHECK. OPS CHECK SAT.