RE: Major Havoc - No video

Thanks for your input, Jon. I will start checking those. As for the power
supply, I have tested my friend's Major Havoc (I am using his as a guinea
pig) and his works fine in that same cabinet under the same conditions, so I
think it's safe to assume that the cabinet and wiring is kosher. (is that a
fair assumption?) I have also checked the voltages on the board at various
keys (+/-15 good, +5s good, etc). No swing on the X&Y outs to speak of.

If I assume that I didn't screw up any traces (let's pretend I didn't since
it is exhibiting the same issues as it did when I started this blasted thing
- although I will go back and check the 50 or so chips I socketed... :-)),
where might I concentrate my efforts? In the actual vector gen area? or
look back to resistors, caps, etc in the Video out section?

Thanks again for your help.

Cheers
Andy

-----Original Message-----
From: Jon Raiford [mailto:raiford@mindspring.com]
Sent: February 1, 2001 09:00
To: vectorlist@synthcom.com
Subject: Re: VECTOR: Major Havoc - No video

I haven't traced your symptoms, but I would suggest running through the
Tempest troubleshooting guide (the html version online). Since the game
plays blind, that means the AVG isn't hanging on you.. That might be a good
sign. If you replaced all of those chips, I would double check your
soldering to make sure you hit the traces on top of the board. I would also
suggest checking your power supply. When big blue's die, they do some weird
things. Check all of your voltages w/ a scope if you can and see if they
are clean. etc. etc. etc.

Good Luck :)

Jon

At 11:40 PM 1/31/2001 -0500, you wrote:

>Hello folks,
>
> Got a new Major Havoc problem. No video - even in test mode.
Game plays blind. When I turn up the brightness on the monitor, I see a red
line that kind of looks like an L and seems to change a bit, but not much.
Spot killer is on though under normal monitor conditions. Replaced about
85% of the chips on the board (including every chip in the to Video out
section I mean 6012s, TL084s, 13201s, 082, all of them - with known working
chips). The only chips on the board I didn't replace are some in the rows
5,4,3, 2, and 1 - higher than H. But according to the schematics, it looks
like those are responsible for the actual code execution and that seems to
be working fine since the game plays - but blind.
>
> I am out of moves. I don't know what to do next. I know the
monitor works - tested with other board. The chips I used to replace were
from a "new" stock - randomly tested in a working board - they work. ROMS,
RAMS, CPUs, Pokeys, and AVG chips all known working - were tested in another
board.
>
> At this point I am at a loss. Any help would be greatly
appreciated.
>
>Thanks
>Andy
>
>Andrew Evrovski
>HPC Development Director
>Cyberplex
>t: 902.429.4721 ext.109
>f: 902.423.0899
>www.cyberplex.com

---------------------------------------------------------------------------
** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
** message body to vectorlist-request@synthcom.com. Please direct other
** questions, comments, or problems to neil@synthcom.com.

---------------------------------------------------------------------------
** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
** message body to vectorlist-request@synthcom.com. Please direct other
** questions, comments, or problems to neil@synthcom.com.
Received on Thu Feb 1 11:25:56 2001