Lenovo P70-A Manuel d'entretien - Page 10

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Repair Manual of Lenovo P70-A Mobile Phone

4.1.2 LCD backlight without lighting

LCD backlight without lighting

Check whether the connection of FPC on

LCD module and connector on main board is

good and whether the LCD backlight is

normal after reconnection

Re-verify whether the LCD backlight is

normal after replacing LCD.

Check whether there are voltages more than

24V between both ends of C1612 when LCD

is lit.

Check the welding condition of U1603 and

peripheral devices, including L1601,

D1601, C1612,C1611，R1605,R1606

If the backlight circuit is

normal, it is the problem

of LCD