No Display (No Power) - LG LRG3091ST Service Manual

CHECKING FLOW CHART BY FAILURE

No display (No power)

Blank display
Enter key input
Some beep
sounds?
No
Check AC input voltage of Power PCB
- Power PCB CN02 (pin 5 and 7)
CN02 CN02 CN02 CN02 CN02
CN02 CN02 CN02 CN02
CN02 CN02 CN02 CN02 CN02 CN02
CN02 CN02 CN02 CN02 CN02 CN02 CN02
Is it 120V AC?
Yes
Disconnect the power
1
Yes
5 Pin
7 Pin
No
Check the harness of
between L1~N
Normal?
Replace the defective
harness
END
Oven display
blanks?
END
Yes
No
10-2
Yes
No
2