RE: Major Havoc - No video

I have had problems in the past with the metallic looking axial caps near the power regulators above the vector output section. I don't recall what their purpose was, but I remember having to replace them. I'm not sure if that helps you, but they are easy enough to pull and test :)

Jon

At 11:04 AM 2/1/2001 -0500, you wrote:

>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>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
>
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Received on Thu Feb 1 12:14:39 2001