Smart AY Tango Service Manual page 38

controller (which contains the status LED) is mounted vertically on the LH side
wall (when viewed from the front) of the chassis. The image below shows the
location of the LED.
The touch status LED on the controller has a number of states that will indicate if
the touchscreen hardware is working correctly. Watch the LED while touching
the screen and note the status as follows:-
• LED Illuminates On Touch – All touch hardware working. Check drivers
and/or USB cable.
• LED flashes constantly (flickers slowly) – Touch hardware is faulty.
Replace the screen and/or controller.
• LED Always Off – Check cables to touch controller (no power).
To check the touchscreen hardware and cable connections, open the upper
module of the console and proceed as follows.
• Locate the touch cable which runs from the touchscreen to the touch
controller. Check this cable for damage and re-seat the connector where this
cable connects to the controller. Look closely at the connectors to check the
polarity before trying to connect (it is polarised).
th
14 Oct 2009
Touch Status
LED
Tango Smart Console™ Service Manual
38