Just got my DSO Quad. I was excited and plug the battery in. I then smell some burn and feel some heat near the switch.
It didn’t turn on. I searched Seed forum and found this thread. So I swapped the battery wires and the DSO nano can turn on with the battery, but it has no back light. If I use the USB port, the back light comes up. The battery voltage measured is 3.8v. Anyone seeing the back light after fixing this issue? And what’s your battery voltage please?
Thanks
-Thanh
By the way, the battery does have a protection circuit on its output. It didn’t suffer any damage when plugged in in reverse with USB cable connected to the DSO quad.