Polaroid FLM-3201 - 32" LCD TV Service Manual page 24

2. raster, but no picture
Check if the unit yes
can operation?
no
Enter
operation
no
EEPROM,
Replacing
off , turn on again , it if
CPU board
display picture.
Adjust CPU board
Testing
no
Replacing
PIN65
U30
U30 SYNC
signal
Replacing U13
Check if the all
channels have signal?
factory-menu,
CLEAR
then turn
YPRPB
yes
again
yes
of Display
"NO-SIGNAL"
no
Testing
no
1VPP signal
of TP1,
TP2, TP3.
yes
Replacing CPU board
yes
21
no
Which is no VGA/DVI
signal of
channels
TV
no
Testing power
supply (+5V-V)
of video
processing board
yes
Check output 24V-A of
power supply board
Check if PIN2
no
1VPP signal
and noise wave
of P32?
yes
Check if PIN56
15.734KHz
sync signal of
U29?
no
Replacing U29
Replacing CPU
board
Check input 22V
of sound
conversion board
no
Check input 12V-A
of CPU board
no
Replacing
TUNER01