I have a DSO nano v2. There is a problem with its power recently.
When I connect it with usb cable to computer, it works well.
But when I disconnect usb, its power is gone. Somtimes it power off immediately.
Sometimes it is still on, but with very weak backgroud light.
It still show USB on the top left corner of the screen when i disconnect the usb cable.
what’s wrong with it?