VXDIAG VCX SE Communication Lights Not Turn On Solution

Customer problem:

Bought 2 VXDIAG VCX SE Benz unit. One connects with the laptop well and vx manager detected the device. Another one was not detected by vx manager and the communication lights did not turn on. Any solution?
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Solution:

You have to insert USB cable to the VCX SE unit very tightly.  If fully insert the cable into VCX SE unit, the communication light till not turn on, there is something wrong with the device. It may need a factory repair.

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