Toshiba 42HL67 Service Manual - Page 13
Replace the, LCD display., Main Power, supply., Low B power, SYSCON, - lcd replacement
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UPC - 022265000458
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NO Does the back light YES function and then turn off? Is NO 24 VDC present at pins 1 and 5 of P804 YES when the unit is turned on? Replace the LCD display. Replace the Main Power supply. NO Is 6VDC present at pin 8 YES of CN91A when the unit is turned on? Is YES 3.3 VDC present at NO pin 7 of P812A shortly after the unit is turned on? Replace the Low B power supply. 12 Replace the SYSCON section.
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Does the back light
function and then turn
off?
YES
NO
Replace the
LCD display.
Is
24 VDC present
at pins 1 and 5 of P804
when the unit is
turned
on?
YES
NO
Replace the
Main Power
supply.
Is
6VDC present at pin 8
of CN91A when the unit
is turned on?
NO
YES
Replace the
Low B power
supply.
Is
3.3 VDC present at
pin 7 of P812A shortly
after the unit is turned
on?
YES
Replace the
SYSCON
section.
NO
12
12