[chbot] Reprogramming ESM-1000 displays at Monday's meeting.

[Mark Beckett]

Spencer
I have a couple but I'm not panicing, so if there's time,  on the night.

Thanks
Mark

Spencer Travers wrote:
> I have come up with a procedure to enable the ISP port on the displays 
> we got at the last meeting. This then allows unrestricted 
> reprogramming of the device. I have had success with all three 
> displays I tried it on.
>
> The connection between the reset IC and the MCU must be temporarily 
> broken. I just removed (and later replaced) the reset IC but there are 
> other options we can explore. Cutting the reset pin directly on the 
> MCU may work. The relevant trace on the PCB is somewhat obscured by 
> the smart card socket. 
>
> I will bring my gear along to the Monday meeting for anyone who wants 
> to unlock their display. It would be good to get an idea of how many 
> there are to do - can you please respond if you want to do this to 
> your display. It would be helpful if you could prepare by opening the 
> case and removing the four T5 screws holding the main PCB down. There 
> is no need to remove the LCD.
>
> Spencer
>
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