DM42 really bricked

Discussion around the SwissMicros DM42 calculator
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pm42
Posts: 64
Joined: Mon Oct 03, 2022 3:09 pm

DM42 really bricked

Post by pm42 »

Hi,

I've tried to update my DM42 firmware. So I copied the file, ejected the drive from the Mac and then it asked for confirmation which I provided.
It started updating and at this point I removed the USB cable (by habit I guess).

The screen went blank and the DM42 unresponsive to any key.
So here is what I tried:

- press Reset
- press and hold PGM, press Reset for 2 to 3 secs, release Reset, release PGM
- the same with a brand new battery
- the same with the USB cable connected

Nothing changed: the screen is still blank.

Is there something I can do?

P.S: I sent an email to SwissMicros but no answer yet.
pm42
Posts: 64
Joined: Mon Oct 03, 2022 3:09 pm

Re: DM42 really bricked

Post by pm42 »

I got an email from SwissMicros and fixed the problem with dm_tool. I'm impressed that it worked. It is really well designed.
And the answer was perfect too.
User avatar
ijabbott
Posts: 253
Joined: Fri Dec 15, 2017 2:34 pm
Location: GB-MAN

Re: DM42 really bricked

Post by ijabbott »

I don't know what the screen is supposed to look like in Bootloader Mode. Does sudo dfu-util -l find anything?

FW Update Using dfu-util
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