Nokia 447ZiPlus - No Video Signal Troubleshooting

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Are the
waveforms at
pin 2,6,11 of
I901 Normal
?
No Video(raster appear)
Are the
voltages at pin
15 of I901
normal ?
Are the
waveforms at
pin 35,32,29 of
I901 normal ?
Is
The voltage at pin
17 of I901
normal ?
Are the
waveforms at
cathode R/G/B
of CRT normal
?
Check signal cable,
C901, C931, C961
Check ABL line from PCB
Check D941
I901 is defective
CRT is defective.
Check video circuit
voltages on
Pin 1,3,5 of I904.
Check 12V lines
Check 75V lines.
Yes
Yes
Yes
Yes
Yes
N
o
N
o
N
o
N
o
N
o
(2) No Video (raster appear)