A lot of times, we have seen Grandstream video conferencing unit (GVC 32XX series) are stuck at booting up with the logo.
Here are the steps you may try to recover the device:
1. Unplug GVC 32XX from he power adapter
2. Copy the firmware files (.bin file) to the root directory of a SD card; otherwise, Android SHELL UI will pop up
3. Insert the SD card which contains the required .bin files onto GVC32xx's SD port
4. Use a small pin to hold the Reset button, then plug in power adapter (keep holding reset button). You will see "Pressed 0s"."Pressed 1s"... on GVC oLED screen.
Release the reset button once it shows "Pressed 4s" on oLED. (Make sure GVC power is still on.)
5. After releasing the reset button, it will show "SD Upgrade" on OLED screen.
6. From HDMI output screen, it will show the firmware upgrade process.
After the upgrade is completed, GVC device will be recovered.
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