Sipeed LicheePi 4A Board Problem

Problem with USB keyboard input to Sipeed LicheePi 4A board

  1. At present, we have not encountered any customer feedback on this problem.
  2. Please check the USB keyboard itself, replace it with another keyboard, and whether the receiver of the keyboard has poor contact or is damaged?
  3. Check whether the power supply of the motherboard is sufficient ?

I have 3 spare keyboards; each is a different Logitech model.
Two of the three, when plugged into a USB port, produce the symptoms
described in my original issue (email). The third, and oldest, keyboard
works ok! So I have circumvented the problem, which I am guessing is
related to the electrical level presented by the keyboard, to the USB port.

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