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Abnormal
phenomenon
28．The front
power on key has
no function
29．Large screen
boot without image
Cause analysis
2. The internal USB cable is loose
1. Loose connecting wire
2. The front switch is broken
1. Video cable problem
2. Output resolution setting
Terms of settlement
2. Check whether other USB ports
are normal
3. Replace the new machine
1. Re insert the connecting wire
2. Replace the new machine
1. Check whether the video cable
connected between the equipment
and the large screen is firmly
plugged in
2. Check whether the output
resolution set by the software is set
to adapt to the large screen
3. Re -upgrade the software
4. Replace the new machine
11
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