Hisense LHD32D33EU, Руководство по обслуживанию

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5.3.3. Display Troubleshooting (blank screen or show nothing)
Indicator light on?
N Y
Check if UD1 Pin 1 is 5V
Check if power supply is ok
(such as 5V,1.0V,1.5V,3.3V)
Y
Check if R66 exist 560-600
MHZ clock
N
Check if external power
supply is ok ?
Y
Check if UL2 have 3.3V
output
N
Check unmoral power
supply module
N
Check if Y1 or
FLASH is OK?
Y
Check if R42 is OK
N
Check UL2
Y
Check if U5 FLASH have
N
Change FLASH
or Y1
N Y
power circuit upgrade or upgrade to death
N
Change IC
chip of UL2
Y
Upgrade or
change FLASH
Change main chip
U1
Change R42