| thaylock | Posted - 09/04/2022 : 14:08:38 Hello,
 I have the GMC320Plus purchased around 2016.
 I haven't used the unit very much or in a long time. I wanted to use it and charged up the battery, but it won't boot up.
 
 - I hold the power button for many seconds and it does not turn on.
 - I've checked the voltage of the LiIon and it reads 4.1 V, so the USB charging is working and it seems the battery is not damaged by being stored for a few years.
 - When I plug in the USB to a computer, it seems to be recognized (COM port detected in Windows Device Manager, but haven't done more debugging here).
 - When I plug into a computer, or charger, the backlight turns on for the screen, but nothing more.
 - I've tried with the unit plugged into a computer or charger, with no battery inside and still it will not boot.
 
 Any ideas what else I can debug?
 Thanks,
 Tom
 
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