Display Problems - Siemens Gigaset 4010 Micro Service Manual

5.1.6.2 Display problems

Fault code: D 4
Affected unit: Gigaset 4000 Micro handset
Components:
Display, display connector
Needed equipment:
soldering iron
Working material:
solder, flux
Diagnosis:
Missing lines or colums are a symptom for an electrically faulty display.
When the display doesn't show any sign there can be different reasons.
First check if only the display is faulty by pressing some keys (confirmation tone).
Possible causes:
- Cold soldered pins on display connector.  resolder connector
- Display foil not properly connected. open, insert foil and close connector
If that didn't help replace the display.
If afterwards the display still doesn't work, send the handset to WSC.
Repair by component exchange:
The display is connected via zero craft connector. It is available as a spare part.
Open the snap hooks of the display and lift it.
Use a thin screwdriver and insert it carefully between foil cable and connector snap
hook. Lift the screw driver upwards in order to snap the hook open.
Take a new display and insert the foil in the connector and snap hook into place.
Fix the display on the board.
Test:
Make a display test using the procedure described in the service procedures.