Hardware Trouble Shooting; No Picture & No Sound - Daewoo LA37L1B1LM Service Manual

6. Hardware Trouble shooting

1) No picture & No Sound
- In case of All mode
START
Yes
Check
The input power of Digital
Board s P801 #14, 15pin
12V is correct
No
Is the LED is Blinking?
No
Check the P801 #11 pin
5V is correct
Yes
Power Board problem
Replace the Power PCB
Yes
Check the SMPS and input voltage
Yes
IC401 problem.
Replace the Main PCB
No
Check the #15 pin Cable
is correctly connected
IC401 problem.
Replace the Main PCB
-13-
No
Yes
Perhaps Connector and
Cable problem.
Replace connector or cable.