LG Electronics LD84A service manual No Raster

2.No Raster

(1)Symptom

1)No OSD abnd image occur at screen.

2)It maintains the conditioon where the front LED is blue.

(2)Check process

No

Does minute discharge

at Module?

Yes

No	Is output the normality
Is the inverter on?	Low/High voltage except
	Stand-by 5V?

Check the LCD Module.

No

Replace the Power board.

Is the link

cable normal?

Yes

Is the IC801’s output normal?

Yes

No

Reconnect Panel link cable. (P401 or P406 or P407)

No

Replace the Main board.

Change the IC(IC100).

* Caution

Before change Main Board,

Check S/W version and White Balance value.

Change Main bord.

S/W download and set White Balance value.

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