What was found
EMERGENCY LIGHTS ILLUMINATED ON LANDING AND STAYED ON FOR APPROXIMATELY 30 SECONDS, THEN WENT OUT. ONLY 2 LIGHTS ILLUMINATED, FORWARD AND AFT OF EMERGENCY EXIT ROW RIGHT SIDE OF AIRCRAFT. ACFT GROUNDED. LOCATED BATTERY PACK & POWER SUPPLY M1671 AT ROW 22-23 RIGHT AT FLOOR SIDEWALL. FOUND THIS POWER SUPPLY HAD A MISSING SELF-TEST ASSEMBLY. REMOVED AND REPLACED POWER SUPPLY IAW AMM 33-51-06-960-806. OPS TESTED GOOD. THIS POWER SUPPLY ILLUMINATES THE 2 EMERGENCY LIGHTS AFT OF EXIT ROWS AT 17DEF & 21DEF. REPLACED THE POWER SUPPLY M1695 IAW AMM 33-51-06-960-806. OPS CHECKED GOOD. THIS ILLUMINATES THE RIGHT OVERWING EXIT SIGNS AND CEILING EXIT LOCATER SIGN. LOCATED POWER SUPPLY M1676 AT ROW 7 CARPET RISER, PRESSED SELF-TEST SWITCH, AND FOUND EMERGENCY LIGHTS AT ROW 9 - 14 ILLUMINATED CORRECTLY.