Philips Avalon FM20, Service Manual

Page: 112 / 260

8 Troubleshooting
112
Touchscreen Not Functioning
General Monitor INOP Messages
Symptoms Possible Causes of Failure Failure Isolation and Remedy
Touchscreen not
functioning Touchscreen functionality has been
temporarily disabled Check if the touchscreen functionality has
been temporarily disabled (padlock symbol
on
Main Setup
key). If yes, press and hold
the
Main Setup
key to re-enable the
touchscreen operation.
Touch screen cable not connected Check the connection from the Display
assembly to the Recorder Adapter Board.
If the problem is not resolved, check the
multi-pin connector between the Recorder
Adapter Board and the main CPU Board.
Touch controller defective Replace the Display assembly.
Touch sensor defective
Main CPU Board defective
Replace the Main CPU Board.
Touch Position invalid Touch not calibrated Perform the touch calibration:
1
Enter the Service Mode.
2 Enter the
Main Setup
menu.
3
Select
Hardware
.
4
Select
Calibrate Touch
.
INOP Message Possible Causes of Failure Failure Isolation and Remedy
Check Monitor Func
Problem with the voltages (5 V) in the
monitor Remove all I/O boards and put them back
in one at a time to isolate any defective
board. If this does not resolve the problem,
replace the main board.
Check Monitor Temp
The temperature inside the monitor is too
high Check the environment for possible causes.
Main Board defective Replace the Main Board.