Re: ASTEROIDS VIDEO OUTPUT

I see how they would affect output.(which was weak,not dead) But I don't
understand why that would cause the self test to not count ram. Reset or any
other button produces just a chirp now. could there be a conflict between
the old and new ram.All are MM2114N's. Old ones were also marked 1033C and
new ones B8408. Probably not a bad idea to do the other 2 any way but i was
wondering if this would cause the self test problem.
thanks
----- Original Message -----
From: "Rodger Boots" <rlboots@cedar-rapids.net>
To: <vectorlist@synthcom.com>
Sent: Friday, October 04, 2002 2:39 AM
Subject: Re: VECTOR: ASTEROIDS VIDEO OUTPUT

> Louis Srianomai wrote:
>
> >Good chance that the Op-Amps went out. I had the same problem about a
> >year ago on 2 boards. I replaced all 4 op amps (2 81s and 2 82's) and
got
> >video back. The bad op-amp probably took your 4016's out too so you
> >need to replace those, or you may get squished video.
> >
> >
>
> And whenever you have to replace a 4016 use a 4066 instead. It's an
> improved and more reliable part.
>
> >--- Mike Ellingson <mike.ee@gte.net> wrote:
> >
> >
> >>Hi. I have an Asteroids board that plays but no video. Self test said
P4 was
> >>bad. Replaced all 4 vector rams and still no video and now no self
test.(just
> >>one single chirp) when any botton is pressed but game still plays. Tried
a
> >>vector eeprom from a parts board and no change. would greatly appreciate
any
> >>help.
> >>Thanks
> >>
> >>
> >>
>
>
>
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Received on Fri Oct 4 18:42:09 2002