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Author Topic: A4000 keyboard repair  (Read 424 times)

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Offline klx300rTopic starter

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A4000 keyboard repair
« on: May 20, 2016, 10:19:03 PM »
so got home early this afternoon to enjoy the long weekend here and what do I do before picking the kids up from school? why trouble shoot my A4000 keyboard of course:)

so issue is my W and Enter keys weren't working so open up case and this is what I found AFTER a cleaning:
A4000 keyboard by G S, on Flickr]A4000 keyboard by G S[/URL]

contact pads were badly rusted so question is what I can I put on them to make sure the rust doesn't come back?? grease, spray lube??
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Offline Oldsmobile_Mike

Re: A4000 keyboard repair
« Reply #1 on: May 20, 2016, 10:29:53 PM »
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Offline orange

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Re: A4000 keyboard repair
« Reply #2 on: May 20, 2016, 10:36:07 PM »
the black thing is graphite, you need something conductive. I've used liquid silver with not much success, its probably better to try liquid graphite. both are not cheap.
Better sorry than worry.
 

Offline paul1981

Re: A4000 keyboard repair
« Reply #3 on: May 20, 2016, 10:42:29 PM »
WD and a clean cloth - get those pads clean and don't forget to clean the thingy bob which contacts the pads (also with WD).
 

Offline orange

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Re: A4000 keyboard repair
« Reply #4 on: May 20, 2016, 10:47:51 PM »
I think wd, contact cleaner or similar would just remove more graphite, making it worse.
Better sorry than worry.
 

Offline paul1981

Re: A4000 keyboard repair
« Reply #5 on: May 21, 2016, 12:58:21 AM »
Quote from: orange;808880
I think wd, contact cleaner or similar would just remove more graphite, making it worse.

WD doesn't hurt anything in my experience. Joypad buttons, remote control buttons, rubber, pots, switches...they all LOVE WD-40. Everything loves WD-40!
 

Offline Zylark

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Re: A4000 keyboard repair
« Reply #6 on: May 21, 2016, 01:44:03 AM »
WD40 probably won't hurt any - and will leave a thin film of oil to protect from further corrosion. But to actually clean electronics and get something that has a bad contact working good again, like say potentiometers, buttons and similar electro-mechanical devices, you want a specialist contact-cleaner.

Now, WD40 - the company - do sell this, link here. I'm sure similar products from other brands (CRC for instance) will do just as well.
 

Offline klx300rTopic starter

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Re: A4000 keyboard repair
« Reply #7 on: May 21, 2016, 01:55:20 AM »
guys my experience with WD-40 is that it's greasy and attracts alot of dust/dirt over time
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Offline paul1981

Re: A4000 keyboard repair
« Reply #8 on: May 21, 2016, 02:14:33 PM »
Quote from: Zylark;808890
WD40 probably won't hurt any - and will leave a thin film of oil to protect from further corrosion. But to actually clean electronics and get something that has a bad contact working good again, like say potentiometers, buttons and similar electro-mechanical devices, you want a specialist contact-cleaner.

Now, WD40 - the company - do sell this, link here. I'm sure similar products from other brands (CRC for instance) will do just as well.


Contact cleaner and pots don't mix (haven't tried WD's version). It'll work crackle free for a short while, but the crackles then return worse than ever! WD-40 fixes the crackles and stops crackles returning. This is my experience, but I'd never dream of spraying anything else into a pot or switch.
 

Offline klx300rTopic starter

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Re: A4000 keyboard repair
« Reply #9 on: May 21, 2016, 04:56:36 PM »
ok damn this keyboard work taking alot longer than I thought so anyhow good news is that the non working keys are working again with a good cleaning and some WD-40 BUT problem is I have to press quite hard to make contact so next step is to tear down again and put some of that graphite paste orange was talking about.
Looks like the cleaning of the rust wore down quite a bit of the contact pads
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Indivision AGA & Catweasel MK4+= Amazing
! My Master Miggies-Amiga 1000 & AmigaOne X1000 !
--- www.mancave-ramblings.blogspot.ca ---
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***X1000- I BELIEVE *** :angel:
 

Offline orange

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Re: A4000 keyboard repair
« Reply #10 on: May 21, 2016, 05:24:25 PM »
have you checked the other end?
Better sorry than worry.
 

Offline paul1981

Re: A4000 keyboard repair
« Reply #11 on: May 21, 2016, 05:56:55 PM »
Quote from: klx300r;808921
ok damn this keyboard work taking alot longer than I thought so anyhow good news is that the non working keys are working again with a good cleaning and some WD-40 BUT problem is I have to press quite hard to make contact so next step is to tear down again and put some of that graphite paste orange was talking about.
Looks like the cleaning of the rust wore down quite a bit of the contact pads


Cleaning them has revealed the wear on them no doubt.
 

Offline klx300rTopic starter

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Re: A4000 keyboard repair
« Reply #12 on: May 21, 2016, 06:06:21 PM »
Quote from: orange;808924
have you checked the other end?

ya they seem fine it's the pads on the main board that are the issue
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Offline klx300rTopic starter

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Re: A4000 keyboard repair
« Reply #13 on: May 21, 2016, 06:07:05 PM »
Quote from: paul1981;808926
Cleaning them has revealed the wear on them no doubt.

yup for sure
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! My Master Miggies-Amiga 1000 & AmigaOne X1000 !
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***X1000- I BELIEVE *** :angel: