Lcd/Illumination Problems; Lcd; Touch Screen; Illumination - Sony Ericsson P900 Troubleshooting Manual

8 LCD/Illumination Problems

•
Make a general visual inspection for corrosion or oxidation from liquid damage according
to point 1.2

8.1 LCD

•
Turn on the phone. Go to the service test menu; choose "Display".
•
Check if the LCD is working properly and if there are missing lines or discolours. Replace
it if necessary.
Note: Check the LCD and IC driver cushion (Fig. 8.1) before mounting the cabinet upper sup
assembly. Replace it if necessary.
If the fault still occurs, try to update the phone to the latest available software version. If this
doesn't solve the problem, handle the unit according to the local company or the GSP
directives.

8.2 Touch screen

•
Turn on the phone. Go to the service test menu; choose "Touch screen".
•
Check if the touch screen is working properly. Check if the area in the LCD does
correspond to the area pressed in the LCD. If necessary go to Application/Control
panel/Display/Screen/Calibrate screen and calibrate the touch screen according to the
phones instructions. If the fault still occurs replace the LCD.
Note: Check the LCD and IC driver cushion (Fig. 8.1) before mounting the cabinet upper sup
assembly. Replace it if necessary.
If the fault still occurs, try to update the phone to the latest available software version. If this
doesn't solve the problem, handle the unit according to the local company or the GSP
directives.

8.3 Illumination

•
Turn on the phone. Go to the service test menu; choose "Illumination".
•
Check if the illumination is even all over the LCD. Replace the LCD if necessary.
•
Check if the illumination is even in all the keys. Replace the flip assembly (Fig. 8.2) if
necessary.
Note: Check the LCD and IC driver cushion (Fig. 8.1) before mounting the cabinet upper sup
assembly. Replace it if necessary.
If the fault still occurs, try to update the phone to the latest available software version. If this
doesn't solve the problem, handle the unit according to the local company or the GSP
directives.
4/00021-1/FEA 209 549/85 A
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Sony Ericsson Mobile Communications AB
Trouble Shooting Guide, SP/Mechanical
13(21)