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Abnormal
phenomenon
31．A lock appears
on the screen
Cause analysis
3. When writing, the required
shielding area is not reached or the
pen tip is too sharp
4. The infrared tube is blocked
5. Whiteboard software failure
1. The system lock is opened
Terms of settlement
3. Replace the writing pen or write
the test with your finger
4. Check whether there are foreign
objects on the infrared light strip
5. Re -upgrade the software
6. Replace the new machine
1. Operate according to the
operation manual. Generally, the
default unlocking password is 2580
13
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