Acer AL2051 Service Manual page 36

White screen
Check Correspondent
component.
Note: 1. If Replace "MAIN-BOARD", Please re-do "DDC-content" programmed & "WHITE-Balance".
2. If Replace " PWPC" only, Please re-do " WHITE-Balance"
White screen
Measure Q701 base
is high level?
OK
Check Q701, Q702 is
broken or CN407 solder?
NG
OK
Replace Panel
NG
X401 oscillate
waveform is normal
OK
Check reset circuit of
U402 is normal
OK
Replace U402
36
NG
Replace X401
NG
Check Correspondent
component.