Acard ARS-2021D User Manual page 6

7.4 About Buttons ............................................................ 72
7.5 About DVD Writer Not Readable .............................. 72
7.6 About High Failure Rate .............................................72
7.7 About Firmware Update .............................................72
7.8 About Function 12 and Cancellation ...........................73
Appendix 1 List of Functions .................................... 74
Appendix 2 LCD Messages........................................ 76