Chapter 6 Troubleshooting; Checkpoints By Error Mode - Samsung SP42L6HN Service Manual

6. Troubleshooting

6-1 Checkpoints by Error Mode

1. Power Light: Check the master switch (ON/OFF) and the fuse to see if they are operating.
2. LED Blinking: See the basic LED checklist in 6-2-1
Short CN101 on
Sub-Detect Board
Samsung Electronics
< Blinking Temp & Timer LED >
Are fans running?
No
Check for 8Vdc at
CN103 & 104 on Detect
Board
No
Check CN802 pins 8&10 on
the Power board for 12VB
Yes
Replace
the Analog board
< Blinking Lamp and Temp LEDs >
Is lamp cover installed?
Yes
Make sure lamp cover
switch is activating
Yes No
Check boss
on Lamp Cover
No
Replace the Sub-Detect Board
No
Replace the Digital Board
Yes
Replace Detect Board
Yes
Replace fan(s)
No
Replace Power Board
No
Install lamp cover
CN101
Troubleshooting
6-1