32PC5RV (CHASSIS:PP78C) - LG TV Service Manual (repair manual). Page 14

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1) After lighting once it does not discharge minutely from the module. 
2) The relay falls.(there is an audible “Click”.)
3) The color of the front LED turns from green to red.

Is the Power Board

normal ?

Replace Power Board.

Is the output the normal Low/High
voltage except for the Stand-by 5V?

Yes

No

No

Are all the connectors

normal?

Replace the connector.

Replace the fuse.

Replace the Y-Board.

After checking each connector does
is operate correctly?

Yes

No

No

Is the Y-Board

normal?

Is the

appropriate

fuse (FS2,FS1) on the

Y-B/D?

Is the output voltage
normal after removing the
P1 connector of the Y-B/D?

Yes

No

No

Is the X- Board

normal?

Is the 

output voltage normal 

after removing the P11, P12,

P13 connector of

the X-B/D?

After removing the P12 and the output
voltage is normal : Replace the Right X-B/D
After removing the P11, P13 and the output
voltage is normal : Replace the Left X-B/D

No

Yes

Start Check