Re: Scrambled Video on Apple II+

[salfter@salfter.ncc74656.dyndns.org (Scott Alfter)]

In article <397fb5d0@naylor.cs.rmit.edu.au>,
Matt Jenkins  <mdj@bilby.cs.rmit.edu.au> wrote:
>Bryan Villados <news001@nospam_macgeek.org> wrote:
>> I received an Apple II+ with a logic board problem. When turned on, it
>> gives a bunch of H's in inverse mode across the screen. Which chips
>> should I be looking at checking out?
>
>First thing I'd try is removing and reseating the ROM chips, then try 
>CPU, RAM, etc.
>
>There's about 120 chips on the Apple II+ which make it a nightmare to find
>the problem, but in my experience, taking ones time and reseating chips
>systematically often leads to success.

You might find it easier to just take a "shotgun approach" and reseat all of
the chips.  This should only take an hour or so, or a little longer if you
blow out each socket with some canned air (wouldn't be a bad idea).  Between
that, disassembing/cleaning the keyboard, and replacing the dead power
supply, I got my II+ working.

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(IIGS(  Scott Alfter (remove Voyager's hull number for email address)
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