Huawei MediaPad 7 Lite S7-931w - Touchscreen Failure

MediaPad 7 Lite Maintenance Manual
INTERNAL
2012-10-08
Huawei Confidential
Page 46 of 82
Display failure (the
backlight cannot be
illuminated)
Check whether the
U1801 is short circuited.
Yes
Replace the
U1801.
No
Check whether the
Q1303 is short circuited.
Yes
Replace the
Q1303.
No
Check whether
the J1300 is poorly soldered or is
incorrectly connected.
Yes
Repair the
J1300.
No
Replace the LCD
monomer.
9.7 Touchscreen Failure
The following figure shows the principles.