Doing a more friendly reset

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mcc
Posts: 277
Joined: Fri Jun 23, 2017 5:10 am

Doing a more friendly reset

Post by mcc »

Hi,

From time to time I manage to hard fault my DM42 and get the "blue screen" of the DM42.
From my experience the DM42 needs a reset quickly then - otherwise the battery seems to be drained
more quickly.

In such a situtaion most of the time one thing is not present: A handy "thing" to operate the reset botton through this
tiny black hole on the back.
So grabbing the first thing which fits through that hole and is stable enough results mostly in something...metallic.

Poking throw a hole onto a PCB (which is still powered) finding a botton in the dark...looks like to be not the best idea... :)

But I found a replacement:
https://www.rossmann.de/produkte/prokud ... 74417.html
(this is no advertisement, I only using this product for what it is not intended for...)

I dont know, whether this product is available elsewhere, but I am sure similiar products can be bought.

I cut off the part with the brushes and the result is plastic stick, which is 100% non-conductive, has the correct diameter
and is stable enough to operate the reset botton on the PCB.

HTH!

Cheers!
mcc
DM 42 - SN: 00373, Firmware release v.:3.22. / DMCP 3.24. as compiled by SwissMicros
Thomas Okken
Posts: 1100
Joined: Tue May 02, 2017 5:48 pm
Location: Netherlands
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Re: Doing a more friendly reset

Post by Thomas Okken »

I found that a plain old wooden toothpick will do the job as well.
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Walter
Posts: 3070
Joined: Tue May 02, 2017 11:13 am
Location: On a mission close to DRS, Germany

Re: Doing a more friendly reset

Post by Walter »

Thomas Okken wrote:
Tue Mar 26, 2019 9:36 am
I found that a plain old wooden toothpick will do the job as well.
10+
WP43 SN00000, 34S, and 31S for obvious reasons; HP-35, 45, ..., 35S, 15CE, DM16L S/N# 00093, DM42β SN:00041
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PierreMengisen
Posts: 305
Joined: Wed Nov 29, 2017 1:38 pm
Location: Neuchâtel CH

Re: Doing a more friendly reset

Post by PierreMengisen »

or perhaps a lightsaber?
:lol: :lol: :lol: :lol:
Pierre
[TI59 with PC100C; TI-84 Plus CE-T; HP41CV with HP IL loop & 2*82161A DCD & 82162 TP; HP15C; HP28S; DM41; DM41L; DM42; DM41X]
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Over_score
Posts: 160
Joined: Fri May 05, 2017 9:37 pm
Location: France

Re: Doing a more friendly reset

Post by Over_score »

I drilled a second 1mm hole to access the PGM switch and using a simple pushpin :mrgreen:
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DM42 SN00284 & SN03835 running C47, HP34C, HP41CV, HP42S, HP35s, WP34S, HP Prime
Wkccpa
Posts: 1
Joined: Sat Aug 01, 2020 1:23 pm

Re: Doing a more friendly reset

Post by Wkccpa »

Thomas Okken wrote:
Tue Mar 26, 2019 9:36 am
I found that a plain old wooden toothpick will do the job as well.
Brilliant!
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