Our DSO138 2.4" TFT Digital Oscilloscope is perpetually crashing. It turns on, the wave form moves up the screen, the oscilloscope says it's rising in voltage even though it's not rising in voltage, and then it crashes after saying it was rising in voltage a little. The reset button is not helping to resolve this. Does anyone have any solution for this or any resources we can go to to find out how to resolve this issue?