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Author Topic: A500 keyboard fix ?  (Read 2410 times)

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Offline dougalTopic starter

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A500 keyboard fix ?
« on: March 03, 2012, 04:39:45 PM »
Some keys are not working

I pulled the keyboard apart and the membrane looks good, no darker patches or anything. I cleaned it up anyway. The keyboard controller board also looks fine.

What could be wrong ?
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Offline dougalTopic starter

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Re: A500 keyboard fix ?
« Reply #1 on: March 03, 2012, 04:46:11 PM »
Its a row of keys not working.

9,O,L,>.
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A1200HD- Blizzard 1230IV / 64Mb / Kick 3.1 / OS 3.9 / 20GB HD
A4000 040 @33Mhz -Kick 3.1 / 16MB
A2000 Rev4.4 - \'030 @25Mhz / 8MB / Kick 3.1 / ClassicWB
CD32 -     Stock (W/ 2 CD32 Controllers]
A500 Plus - 68000 / 2MB Chip / 2Mb Fast / 2.04/1.3 / A590 / A570
A600HD - 2MB Chip / 8MB Fast / 2GB CF HD / Kick 3.1
CDTV

PowerMac G4 1Ghz (MorphOS / Leopard)

[url]http://amigamap.com/us
 

Offline dougalTopic starter

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Re: A500 keyboard fix ?
« Reply #2 on: March 03, 2012, 07:29:16 PM »
Quote from: Zac67;682320
CAPS LOCK not flashing at power up? -> no power or dead controller
CAPS LOCK stuck after pressing a few times -> bad data connection to mainboard
some keys not working -> depending on layout, bad key contacts, bad matrix lines or bad controller

PS: 9, O, L  - definitely a bad column line, check/measure the common line of those keys running to the controller IC, it's probably bad somewhere (or the solder point)


Great! I;ll take a look tomorrow then

Thanks
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A1200HD- Blizzard 1230IV / 64Mb / Kick 3.1 / OS 3.9 / 20GB HD
A4000 040 @33Mhz -Kick 3.1 / 16MB
A2000 Rev4.4 - \'030 @25Mhz / 8MB / Kick 3.1 / ClassicWB
CD32 -     Stock (W/ 2 CD32 Controllers]
A500 Plus - 68000 / 2MB Chip / 2Mb Fast / 2.04/1.3 / A590 / A570
A600HD - 2MB Chip / 8MB Fast / 2GB CF HD / Kick 3.1
CDTV

PowerMac G4 1Ghz (MorphOS / Leopard)

[url]http://amigamap.com/us
 
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