Ok I've been watching your M100 videos. I think 4 now and the only thing
that seems to maybe talk about scraping is at 15:28 in the video: TRS 80
M100 Part #2 Recap, Mangled Molex, ‘More surprise failures’
Is that what you're talking about?
Curtis Vaughan | Computer Consultant
AvantGuard Computer and Security Systems
Phone: (206) 423-6979 ▪ Web: www.avantguardsystems.com
On Wed, Feb 10, 2021 at 11:51 AM Jeffrey Birt <[email protected]> wrote:
> You need to scrape the solder mask loose where the corrosion has gotten
> underneath. I show how to do this in several of my M100 videos.
>
>
>
> Jeff
>
>
>
> *From:* M100 <[email protected]> *On Behalf Of *AvantGuard
> Systems
> *Sent:* Wednesday, February 10, 2021 10:57 AM
> *To:* [email protected]
> *Subject:* Re: [M100] Newbie
>
>
>
> The link is to a pic of the backside of the board after cleaning. I was
> expecting a greater difference. Should I be concerned?
>
>
>
> https://photos.app.goo.gl/HPoA24GYueEJKucw9
>
>
>
> On Wed, Feb 10, 2021, 05:23 AvantGuard Systems <
> [email protected]> wrote:
>
> As an update after day 1 of working the bottom of the board (since there's
> nothing in the way there and it would be easier) with a white vinegar /
> vegetable glycerin 50/50 solution, it was sticky afterwards. I'm continuing
> to work it more today, but didn't expect it to get sticky.
>
>
>
> Curtis
>
>
>
>
>
> On Tue, Feb 9, 2021 at 1:02 PM AvantGuard Systems <
> [email protected]> wrote:
>
> Thanks Ron,
>
>
>
> I saw one post saying you can soak boards in a vinegar solution. Not sure
> I want to do that, but is that possible?
>
>
>
> Curtis
>
>
>
> On Tue, Feb 9, 2021 at 12:32 PM Ron Lauzon <[email protected]> wrote:
>
> Vinegar. You will find many videos about cleaning up leaking batteries on
> YouTube.
>
>
>
> This is a common problem with vintage computers.
>
>
>
>
>
> --
>
> Weblog: http://ronsapartment.blogspot.com/
>
>
>
> TRS-80 Pocket Computer 2 - TRS-80 Pocket Computer 4 - TRS-80 Model 100/102
> - Tandy 1100FD - Tandy 1400LT - Commodore 64 - TRS-80 Model 4P - Kaypro IV
> - Commodore PET
>
> RC2014 (Mini, Zed and Pro) - Altair-Duino with TI Silent 700 - VT320
> terminal/Raspberry Pi 0
>
> Some people like to work on old cars. But old computers are cheaper and
> don't require a big garage.
>
>
>
>
>
>
>
> Feb 9, 2021, 15:26 by [email protected]:
>
> Just joined the list as I just acquired a used TRS80 Model 100. Of course
> it's not working, so I just wanted to first ask for some advice. I have
> been reading info at Club100.
>
> Basically, I feel I need to buy some stuff at Club100. First and foremost
> a new battery, which is highly recommended. Also expansion RAM (since none
> has been installed), probably the power supply (although maybe premature).
> But probably better cost wise to get everything right away (shipping
> costs!).
>
> Anyhow, opening it up though I see that this thing obviously had batteries
> left in it and there is dry acid (whatever that is) about that general area
> on the board. My concern is that that might be enough damage that there's
> no way to recover it. Or maybe cleaning that area up might be fine. What is
> recommended for cleaning up battery acid, btw.
>
> Thanks for any suggestions!
>
>
>
> Curtis
>
>
>
>
