Dell E156FPc
40
9.2 Trouble shooting
9.2.1 Main Board
No display
Note:
1. If replace “
Main-Board
”, Please re-do “DDC-content” programmed & “White-Balance”.
2. If replace “
Power Board
” only, Please re-do “ White-Balance”
OK
Measured CN701 pin5/6 = 12 V?
Measured CN701 pin 9/10= 5V?
Check main board Power; is there DC level
output? Check U701 pin 2= 3.3V? U702
pin 2= 1.8V? Is there any shortage or cold
solder?
OK
Disconnected the Signal cable (Loose the
Signal cable), Is the screen show Block
WRGB color bars?
Connected the Signal cable again,
check LED status.
Green
Replace U401
Scalar IC
NG
Connected the Signal
cable again Check LED
status.
Check Power switch is in Power-on
status, and check if Power switch had
been stuck?
Orange
OK, Keyboard no stuck
Orange
Green
Check the Wire-Harness from CN101
Measured RGB (R434, R435,
R436,) H/V Input at U401 pin
89,90, Was there have signal?
Check
Correspondent
component
short/open
(Protection Diode)
NG
OK, Wire tight
enough
Check
Panel-Power Circuit Block
OK, Panel Power OK
Check U401 Data-output
Block
Replace
Inverter board
and Check
Inverter
control relative circuit
Re-do White balance adjust
Measured Crystal X401
OK
Replace
U401 (GM2621)
OK
OK, U401 data OK
NG
OK
Summary of Contents for E156FPc
Page 17: ...Dell E156FPc 17 5 Block Diagram 5 1 Monitor Exploded View ...
Page 21: ...Dell E156FPc 21 5 3 2 Inverter Power Board ...
Page 34: ...Dell E156FPc 34 8 PCB Layout 8 1 Main Board ...
Page 35: ...Dell E156FPc 35 ...
Page 36: ...Dell E156FPc 36 8 2 Inverter Power Board ...
Page 37: ...Dell E156FPc 37 ...
Page 38: ...Dell E156FPc 38 ...
Page 50: ...Dell E156FPc 50 b Click the Select Chip button and choose the type you will program ...
Page 52: ...Dell E156FPc 52 d Select the communication Setting Port Name e Click the ConNect button ...
Page 68: ...Dell E156FPc 68 15 Definition of Pixel Defects 15 1CLAA150XP01 ...