LG HX300G Service Manual page 52

Repair Process
Projector
Symptom
Check the test pattern
If all color is OK
①
Change the Main board
C. Image Defect
Color Defect
If the color is not OK,...
How to check
Refer the 'F. Adjust Remote Controller' page
5. DDP OPTIC CHECK (R,G,B,C,M,Y,W full flat pattern)
If some color is not there
①
Making
Revision
Ex) if you cannot see Red pattern, it means that
Red LED has some trouble.
check the R cable.
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<possible cause>
1. Burnt cable
change the cable
2. Dead LED board
change the LED board
3. Dead R LED
change the Engine Ass'y