Please use a shielded USB cable no longer than 6 feet. Longer, thinner, and un-shielded cables are susceptible to interference that can cause your update to fail
If the update does fail, the DAC can easily be recovered by trying again with a different cable or PC
Make sure to extract the contents of the zip files before opening them, the DAC Center may not open within a zip or temp folder as it relies on a separate .DLL file included with the download
The programs "DAC Center" and "Datavideo Upload Firmware" may not open within a zip or temp folder as it relies on separate .DLL and INI files included with the download.
Extract the zip file contents of the firmware upgrade tool to your PC
Disconnect power from the DAC-70 if not already
Run "Datavideo Upload Firmware.exe"
Connect the DAC-70 to your PC via USB
Connect power, making sure to firmly lock the power connector
DAC-70 should automatically connect, otherwise, click the Connect button
Click Open File and browse for and select the file DAC70-FW-0138.BIN
Click the Start button to begin the update
When finished, you will see the word PASS in green letters in the lower right corner of the program
The unit will reboot itself and disconnect from the updater
You can close the update utility, open the DAC Center, and confirm that the unit has updated to latest version
If you see the word FAIL, please try a different cable, preferably one that is less than 6 feet long and shielded, and run the update again. If it fails again, try a different PC. If no combination of PC or cable works, contact Datavideo support at firstname.lastname@example.org
If your PC is managed by an IT Department, ask them if they have any Group Policies in place that restrict the use of the drivers and program files in the DAC-70 firmware download. Alternately, it may be easier to use a personal PC at another location
If you continue to experience update issues, there may be a compatibility issue with your version of Windows, PC hardware settings, Bluetooth settings, USB devices already connected, or 3rd party software installed. There is no simple solution for these issues, but two good starting points would be to try the utilities in the below Microsoft articles. Please note that in using these utilities provided by Microsoft, you are doing so at your own risk. If you need additional assistance, contact Microsoft Support.