How did you find this isuue? Did any testing? If yes, please indicate the detail(incl. testing tool, photo if applicable)
"Most problems found by customers at end-user’ office
1. Monitor off during operation and can not be opened again.
2. Can’t turn on power in the morning
3. some monitor our customer swap to other machine, it doesn't work. then they plug it back to the original machine. it doen't work too. They did nothing with old machine.
4. We don’t find any special other signs"