3M ET 350 Benutzerhandbuch

The touch screen drivers can detect error conditions that are independent 
of the operating system. If you see one of the following error messages, 
please note the number displayed with it. This will help 3M Touch 
Systems technical support staff to diagnose the problem (see page 3).

9002: Unable to 
communicate with touch 
controller. Check COM port 
settings and cabling.

1.

Disconnect power to the controller. 

2.

Double-check all connections between 
the controller and the host computer.

3.

Re-connect power to the controller.

4.

Double-check COM port settings for all 
peripheral devices and the controller.

5.

Ensure no other touch drivers are loaded.

6.

If the error message persists, call 
3M Touch Systems for assistance.

91xx: Touch controller 
image error detected.

•

When turning on the MicroTouch NFI 
touch screen system, make sure that 
nothing is touching the touch screen or 
bezel. 

•

If error persists after power-cycling with a 
clean, untouched screen:
•

There may be short circuits to the 
touch controller or screen.

•

The touch screen connector may be 
loose.

•

The touch screen or controller may 
need servicing.

•

Double-check all connections between 
the controller and the host computer.

•

If the error message persists, call 
3M Touch Systems for assistance.

91xx: Unrecoverable 
EEPROM failure detected 
in touch controller. Touch 
screen is inoperable. 
Servicing is required.

•

Controller requires servicing. Call 
3M Touch Systems for assistance.

91xx: Touch controller failed 
RAM or ROM test. Touch 
screen is inoperable. 
Servicing is required. 

•

Controller requires servicing. Call 
3M Touch Systems for assistance.