Samsung LT15M23C Service Manual page 14

4 Alignments and Adjustments
4-2 Factory Mode Adjustments
4-2-1 Entering Factory Mode
1. To enter "Service Mode" Press the remote -control keys in this sequence :
- If you do not have Factory remote - control
- If you have Factory remote - control
4-2-2 Factory Mode Tree
4-2 LT15M23C