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White screen
Check Q602, Q603 is broken
or CN501 solder?
Check Correspondent
component.
White screen
Measure Q603 base
is high level?
OK
NG
OK
Replace PANEL
NG
X301 oscillate
waveform is normal
OK
Check reset circuit of
U401 is normal
OK
Replace U401
55
Dell 1907FPc
NG
Replace X301
NG
Check Correspondent
component.
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