LCD MONITOR 15EX
LCD MONITOR 15EX
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TA MAINTENANCE
TA MAINTENANCE
47
7.2
7.2
No Display( System Fail ) Or Display Abnormal
No Display( System Fail ) Or Display Abnormal
Symptom:
Symptom:
The LCD no display,but power and back light is good.or show abno
The LCD no display,but power and back light is good.or show abno
rmal picture.
rmal picture.
Picture abnormal
Picture abnormal
Is Picture
OK?
NO
YES
END
Replace following parts one at a time and test after each
replacement until find out which part caused the problem
1. PC to monitor cable
2. LCD module
3.
15EX-TA Interface Board
to inverter BD cable
Is Picture
OK?
YES
NO
Replace
15EX-TA Interface Board
or go
into board level Trouble-shooting.
To find out which part is
causing the problem.
1. Make sure the PC VGA adapter is good.
2. Check the VGA cable is connected to PC properly.
3. Make sure the power adaptor & power BD is good.
4. Make sure all cable and PCB connect properly.
Board-level
Troubleshooting
Check the following parts for cold solder or one of the
following parts on the mother-board may be defective,
use an oscilloscope to check the following signal or
replace the parts one at a time and test after each
replacement.
Signals:
J1 U1
X1 Y2
U11 U10
J3 J4
R1~R4 D2~D4
B9 B11
B13 RP1~RP10
B39~B77 R97
R83~R84
INVERTER BD
VGA_R VGA_G
VGA_B HFS
HCLK HDATA[0:3]
SCL SDA
E_R[2:7] E_G[2:7]
E_B[2:7] O_R[2:7]
O_G[2:7] O_B[2:7]
H_SYNC V_SYNC
LCD_CLK DE
Parts:
