Samsung QN55Q75CNF Service Manual page 61

4. Troubleshooting
TV SMPS:
1. Remove TV Back Cover (Follow Repair Preparation Procedure)
2. Connect Discharge Tool across leads of each large Capacitors to remove its charge.
3. Remove Connector CNM803.
4. Connect TV side Backlight Test Cable.
5. Apply One Connect AC Power and verify Backlight On.
4-20