PN-E602 (serv.man3) - Sharp Monitor Service Manual (repair manual). Page 127

PN-E702/E602　TROUBLESHOOTING

 7 – 4

Any problem with the adjustment/ settings?

OK

OK

OK

Does the signal input correspond to the selected input?

Yes

Yes

Yes

Is the menu displayed with the signal being input?

Replace the expansion I/F PWB. 

Problem found

Make readjustment/ resetting from the menu.

Select the input source properly.

Replace the graphic board.
Check the connected devices.

Replace the defective part.

Replace the abnormal part.

Problem found

Problem found

No

No

No

DVI connection only
   Any problem with the connected devices?
   Any problem with the resolution of graphic board?

Any defect with the LCD module and related devices? 
   Any defect with the connecting cable?
   Any defect with the LCD control PWB?

Any defect with the video input signal of BNC?
   Any problem with the terminal setting?
   Is the BNC connection proper?
   Any defect with the video cable?
   Is the video signal a particular kind? (Out of support) 

Any defect with the main PWB and related  
devices?
   Any defect with the connecting cable?
   Did the fuse (F102, F801) blow out?
   Can it communicate via RS232C/LAN?
   Any defect with the PWB?

Vcom (Common electrode voltage) 
adjustment is required when replaced C-PWB 
or LCD module.