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Does not work at all.

Does not work at all.
Update Time:2012-06-11
Q. Does not work at all. A. Is LED turned on at booting? -> No, LED is not turned on. Check if polarity of the power is correct. Check if voltage is impressed appropriately. -> Polarity of the power is correct. Voltage is impressed appropriately. Check if board number of short plug is correct. -> Board number of short plug is correct. The touchscreen and/or controller may be broken. -> Yes, LED is turned on. Check if board number of short plug is correct. -> Board number of short plug is correct. 1) Does the LED flicker upon touching the panel? a) No, the LED does not flicker. The touchscreen may not be installed properly, or may be broken. b) The LED is continuously on. The touchscreen may not be installed properly, or may be broken. c) the LED flickers. There must be communication problem. 2) Is the communication cable appropriate? 3) Is driver software installed properly? 4) Was it rebooted after installation of driver software? If the touchscreen comes with a back shield, check if the back shield is grounded or not. (Back shield*2 is supposed to be connected to the shield line of the controller board.)