HP 2009m

20" LCD Color Monitor HP 2009M&2009F
34
White screen
White screen
Check Q403 is broken or
CN402 solder?
Check Correspondent
com
p
onent.
Re
p
lace Panel
Check Correspondent
com
p
onent.
Replace U401
OK
OK
Replace X401
OK
NG
NG
NG
NG
Check reset circuit of
U401 is normal
OK
X401 oscillate
waveform is normal
Measure Q403 base
is low level?