WP 34S will not turn on

[marsman2020]

(02-28-2020 12:59 AM)brettpim Wrote:  I did just buy some custom USB boards for the WP34S and used one to make a WP34S from another HP-30b I bought. Would I be able to a USB board to fix the board or does it really require a JTAG?

thanks
brett

The USB board is an FTDI USB-Serial adapter, similar to the Prolific unit you already have. It attaches to the serial port on the microcontroller, not the JTAG port.

There are lots of inexpensive JTAG hosts available these days, all the way down to using the $5 Raspberry Pi Zero as a host - https://github.com/synthetos/PiOCD/wiki/...TAG-Dongle

I don't have any direct experience using JTAG with the HP30b though.