Apple II+ No Video, yet Boot is OK

3 replies [Last post]
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Joined: Apr 5 2016
Posts: 32

Hey guys,

Trying to get an Apple II+ working again and can't seem to figure out where to start.

The machine has a Language Card and Disk ][ Controller Card and nothing else.

Power up "beeps" OK and disk activity sounds good, appears to boot into DOS no problem.

Yet there is no video at all.

I am using Amdek Color-I monitor which I know works OK from another system.

I have tried removing both Cards and booting, yet still no video.

None of the chips on the main motherboard produce abnormal heat, and all chips/connections on the board appear clean visually.

Any suggestions on where to start?

David

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6502enhanced's picture
Offline
Joined: Feb 23 2006
Posts: 243
Re: Apple II+ No Video, yet Boot is OK

Hi David,

- checked the trimmer?
- here you find some hints: http://www.willegal.net/appleii/appleii-repair.htm
- and here also: www.appleii-box.de/H198HomeRepairGuide.htm

speedyG's picture
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Joined: Nov 16 2011
Posts: 2376
Re: Apple II+ No Video, yet Boot is OK

Hello whynotpizza,

like in all such cases:
it's usefull to add a picture(s) of the mainboard.....
rather often simple problems can be detected by visual inspection....
sincerely
speedyG

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Offline
Joined: Apr 5 2016
Posts: 32
Re: Apple II+ No Video, yet Boot is OK

Doh! Sorry guys.....

Turns out I did have a problem with the monitor!

System actually was working all along!