Illumination Problems - Sony Ericsson K750 Troubleshooting Manual, Mechanical

8 Illumination Problems

Problem Area Items to Check
Before proceeding !
Keys:
The entire keypad
Visually inspect whether the keyboard
or a portion of the
flex film is properly connected to its
keypad does not
connector on the PCB
illuminate.
Visually inspect the keyboard foil.
If the issue has not been resolved !
If the issue has not been resolved !
Before proceeding !
LCD
4/000 21-1/FEA 209 544/94 C
©
Sony Ericsson Mobile Communications AB
Repair Action
•
Perform a flash upgrade and a setting reset.
•
If improperly connected – Re-establish proper
connection.
•
If dirty or oxidized – Replace it.
•
If damaged – Replace it.
•
Replace the keypad and the keyboard foil.
•
Handle the unit according to local directives.
•
Perform a flash upgrade and a setting reset.
Trouble Shooting Guide, Mechanical
Reference Image
21(33)