[NTLK] MP2100 repair, help needed

[NewtonTalk]

I assume you've tried a brainwipe? Not actually making one, but starting it the usual way and not click on "OK"? I also assume that the power supply and/or batteries are OK? And that the ROM board in these Newtons is an original one?

100% of dead capacitors I've ever fixed on 2x00 mainboards were caused by a non-Newton power supply. So recapping the boards might not yield the expected result.

I was just informed by my wife that we have a large wasp nest next to my Newton stuff. I'll check for details tomorrow. If I manage to get past it and grab my 2x00 box, I can send you replacement boards or working Newtons. Might be a good opportunity to wear my motorcycle stuff again...

Cheers

Frank

-- Newton software and hardware at http://www.pda-soft.de

to finish my tax declaration 

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Von: NewtonTalk [mailto:newtontalk-bounces at newtontalk.net] Im Auftrag von newtontalk-request at newtontalk.net
Gesendet: Mittwoch, 22. Juli 2026 21:00
An: newtontalk at newtontalk.net
Betreff: NewtonTalk Digest, Vol 151, Issue 6

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Today's Topics:

   1. MP2100 repair, help needed (Matthias Melcher)


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Message: 1
Date: Wed, 22 Jul 2026 02:20:57 +0200
From: Matthias Melcher <m.melcher at robowerk.de>
To: newtontalk at newtontalk.net
Subject: [NTLK] MP2100 repair, help needed
Message-ID: <E9A87BD0-C91F-40E2-BC39-E6BF394DC500 at robowerk.de>
Content-Type: text/plain;	charset=us-ascii


Hi Newton fans,

it may not come as a surprise that my Newtons go through some extra abuse when developing and testing hardware, but this has bugged me for a while.

Both of my MP2100 take a long time to switch on. In the beginning, there was a short delay, seconds, then tens of seconds, and eventually it was hit or miss, if the Newton would turn on at all.

Now neither of them is turning on. The power supply works, but even with the reset trick, they are both just dead.

By the description, this is typically caused by rotting capacitors, but Apple learned from the MP100, and the MP2100 has only solid state caps that should not rot. And why do both of my MP2100 show the same symptoms at the same time.

Has anyone seen this before? Has anyone doen a recap on a MP2100? Any other suggestions? Sigh!

 - Matthias

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