NR7101 Dead

Pioneer
Pioneer Posts: 5  Freshman Member
First Comment
in Mobile Broadband

Sudden failure of NR7101. New POE or Ethernet cable do not fix the issue.
no light comes on. No LAN connectivity. Warranty seems to have only been 2 years (looking at support website).
therefore I’ve inspected device. Seems the heatsink medium has come away from aluminium blocks so I suspect a hardware failure due to overheating. Would like to attempt a repair if anyone can help (I’m an engineer).

All Replies

  • n_o
    n_o Posts: 62  Ally Member
    First Comment Friend Collector Second Anniversary

    do you have a TTL adapter ?
    i would start there , see if it tries to boot

  • Pioneer
    Pioneer Posts: 5  Freshman Member
    First Comment

    I don’t. Something like this? https://thepihut.com/products/usb-to-ttl-serial-cable-debug-console-cable-for-raspberry-pi?

  • Pioneer
    Pioneer Posts: 5  Freshman Member
    First Comment

    I would benefit from some guidance on how to correctly use the cable to check functionality. E.g. what software would I run?

    Thank you

  • Pioneer
    Pioneer Posts: 5  Freshman Member
    First Comment
    edited February 4

    Found the open source info with help of chatGPT. Going to use that: https://openwrt.org/toh/zyxel/nr7101?utm_source=chatgpt.com

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