Dell 1907FPf - Backlight Cant be Turned on

Service Manual
39
4. Backlight can’t be turned on
YES
YES
NO
Check U1 pin1 Voltage is High
Check T1/T2 pin8 and pin11 Open
or Short
Check Q7 or Q6
Change T1/T2
Check U1 pin6 Voltage is 5V
Is the voltage 12V at T1 PIN4?
LED Green
Backlight cannot be
turned on.
YES
NO
YES
YES
No Raster
Check T850 or F850