LB-1085 - Sharp Monitor Service Manual (repair manual). Page 48

LB-1085

TROUBLESHOOTING

7 – 1

1 POWER LED FLASHING

*

The following chart is power green LED operation (1 cycle)

1

Power LED flashing timing table

2

Power abnormality

3

Lamp abnormality

4

The power is not supplied

5

The display is not shown / Display abnormality

6

The remote controller does not work

7

No sound / Reproduced sound abnormality

Lamp error

Lamp abnormality. If it occurs 5 times, the unit 
cannot be turned ON. To boot forcibly, while 
pressing [CH_Down] + [VOL_UP], turn AC_ON.
Refer to "3 Lamp abnormality."

Flashing Once

H:On

L: Off

Power error

Flashing twice

Between main CPU's 
Communication error

Flashing 3 times

Vsync

Flashing 4 times

Monitor temperature 
error

Flashing 5 times

H:On

L: Off

H:On

L: Off

H:On

L: Off

H:On

L: Off

Power abnormality. Check the flashing pattern 
of the OPC LED.
Refer to "2 Power abnormality."

Communication abnormality. Check the flashing 
pattern of the OPC LED.  Log analysis of the 
debug print sentence, log analysis by the bus 
monitor. Replace the main PWB. 

Panel temperature abnormality. Since the panel 
temperature exceeds 60˚C, remove the factor 
which causes the temperature rise. 

VSYNC abnormality detection. Video process 
IC operation abnormality.
Replace the main PWB.