[S-4800-list] The electron beam cannot be turned off by the software

[Zhikun Liu]

The electron beam cannot be turned off by the software. 

I have to leave my sample inside the chamber. 

I closed the software, but the E beam is still on. 

When I tried to login again, a window showed up "High voltage power supply is not working. Check that the HV cable is correctly put to the electron gun. Error Code:7303."

Please help to look into this issue.

Zhikun