1977 original apple II restoration (continued)...

["Nama" <lord_philip@mac.com>]

So I just got the motherboard back from the board repair shop (they
removed some hacked wires and fixed a couple of damaged traces to bring
the machine back to original condition).

Now it's up to me to actually get the machine working...

Firstly I swapped out all the RAM for some that I recently purchased,
in the hopes that the old RAM was bad (of course I do not know this to
be true). The problem now is that on 'power up' I get 10 vertical white
bars across the screen. Pushing reset does nothing.

I spent a good deal of time swapping out ALL the ic's (what a painful
job that is), one at a time (including CPU and ROM's) from a ][+
motherboard last night.
After swapping in and out all the chips I still saw absolutely no
change in the 10 vertical bars.
However, I do suspect that the ][+ motherboard I was using for spares
is also dead, but I figured that the chance of the same component being
faulty in the two systems was slim.

I then swapped all the old ram back in, and only then did I see any
change in the screen. The pattern displayed was exactly the same as it
was befor the hacked wire removal and the trace fix. You can see the
pictures of this screen that I had previously taken here (reset still
does nothing):

http://homepage.mac.com/lord_philip/PhotoAlbum18.html

So basically, after the board fix with all the original ic's and RAM in
place there is no change to the screen as previously seen. Replcaing
the RAM, changes the screen to vertical bars.

So, now I'm stumped. Does anyone have any insights.

I have looked in the archives, and have seen reference to other users
experiencing 10 vertical lines but the solution to this problem is
unclear. Most suggestions recomend swapping the ROM's or CPU, which I
have already done.

Cheers

Phil