This article provides information about the Elo Controller Driver Diagnostic Codes

Please see the chart below and the document attached for Elo Controller Driver Diagnostic Codes.
 

Elo Diagnostic Codes:

AA Bit    Value (hex)         Description

7             80                          Touch microprocessor test incomplete

6             40                          Reserved

5             20                          Touch microprocessor test failed – touchscreen may not be connected.

4             10                          Nonvolatile RAM checksum test failure

3             08                          RAM read/write test failure

2             04                          ROM checksum test failure

1             02                          Microprocessor logic/register test failure

0             01                          Firmware/hardware compatibility test failure