Sounds like a static discharge may have done something.
The schematic is available so why not do some simple troubleshooting?
Make sure the 3.3v regulator is working: 5V in and 3.3V out.
Disconnect the battery and see if the unit runs OK off of a USB only power - does the charge LED light?
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On Friday, February 28, 2020, 11:29:27 a.m. GMT-5, Steve London <n2ic@...> wrote:
I have had my nanoVNA since September. Have loaded several different versions of FW without issue.
Today, after doing a calibrate, it locked up. Unresponsive to touchscreen. NanoVNA-saver can't talk to it. Power-cycling and pulling the battery have no affect.
Options, besides trash can ?
Thanks,
Steve
