No display when I click the menu button.

 
How is the default setting when ER330 device turns on but no display?
 
Problem
1. Plug in the SD card or External Hard Drive HDD to ER330, but there is no display on the monitor.
2. I have already completed the initialization, but there is no display on the monitor.
 
 
Solution :
Step1::Press the "OK" button twice on the remote control.
Step2.Press the "BACK" button.



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