Epson MR Series Technical Reference Manual page 203

❏ Check whether the touch panel can now function. If the touch panel can function, check the
customer's touch panel settings for any errors. If the touch panel cannot function, the cause
may be a faulty connection or a problem with the individual unit or the connector itself.
Follow the procedures below.
1. Confirm whether replacing the touch panel unit circuit board solves the problem.
2. Confirm whether replacing the touch panel unit solves the problem.
3. Confirm whether replacing the main circuit board solves the problem.
Note:
You can confirm whether the touch panel circuit board operates correctly by checking the LEDs (red
and green) on the touch panel circuit board.
Red LED
On
On
Off
Off
Touch Panel Unable to Respond Correctly to Commands
❏ Follow the procedures below.
1. Check the touch panel driver settings. (Refer to Chapter 4.)
Note:
When you set up Windows 2000 / XP, perform the double-click settings during installation of the
driver. Refer to Chapter 4.)
2. Confirm whether calibrating the touch panel solves the problem. (Refer to Chapter 7.)
3. Reinstall the touch panel driver after uninstalling it.
❏ Check whether the touch panel can now function. If the touch panel can function, check the
customer's touch panel settings for any errors. If the touch panel cannot function, the cause
may be a faulty connection or a problem with the individual unit or the connector itself.
Follow the procedures below.
1. Confirm whether replacing the touch panel unit circuit board solves the problem.
2. Confirm whether replacing the touch panel unit (1057) solves the problem.
3. Confirm whether replacing the main circuit board solves the problem.
Rev. I
Green LED Possible cause
Flashing Operating normally.
Off Possible failure of touch panel controller.
On —
Off Power is not supplied to the DM-M820.
If the power is supplied to the DM-M820, the fuse on the
touch panel circuit board or LCD circuit board may
burned out.
MR Series Technical Reference Manual
Troubleshooting 8-13