RF Explorer 6G stopped working


I have been using the RF Explorer 6G for about a year now, and it stopped working.
The device doesn’t show anything on the display.
Tried connecting to charger for 24 hours, or connecting to PC.
I also opened it and removed the lipo battery, but it still seems dead.

Tried to supply Voltage to L2 and Ground, and there seem to be a shortcut (i saw 5 Amps and quickly disconnected).

Any idea of what may be causing it?

Any idea