Crossbow errors

jehuie

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Hey guys, I brought this Crossbow home last night. It was getting checksum errors on the screen when he showed it to me. So this morning I tried it and was getting a variety of different responses when I powered it on. Sometimes ROM CRC errors, sometimes rug patters or misc. garbage on the screen.

I checked the +5 (someone put in a switcher) and it was good. So I pulled the boards and removed and reseated all 8000 socketed rom chips. They looked really clean. I went and tried it again and now it very consistently passes the Ram and rom checks but....

Now it give me an "Audio power down" error and "please press start" but won't do anything when I press start. It just sits there at the test screen.

Interestingly, it would go past the start screen before when it failed the crc checks and it wasn't getting the "Audio power down" message then.

So it appears reseating the roms helped...but....I have introduced another problem.

Any Exidy experts out there want to chime in? Thanks!
 
Well, I played with the ribbon cable between the cpu and the soundboard and started it again. Now it will start and play fully but there's still no sound. Perhaps I have a bad ribbon cable? Where can I find a replacement for that piece?
 
Ok, due to all the helpful suggestions in this thread, the game is now working 100%. Thank you everyone! ;)
 
Ok, due to all the helpful suggestions in this thread, the game is now working 100%. Thank you everyone! ;)

Yes, I too make sarcastic comments when only one person posts in my help thread about a relatively rare game after 3 hours. :p Seriously though, post what you did to fix it for anyone who has the same issue. :)
 
Sorry about that. Yes, everyone on here is always amazingly helpful. In this case, it turned out to be an easy fix so nobody really had a chance to chime in before I had it going.

Basically, I pulled the boards and re-seated all the roms on both the cpu and the sound board. Normally, I would clean them with Tarn-X since the black gunk tends to built up on them. But in this case the legs were all shiny and clean. Anyway, re-seating them cleared up the intermittent rom errors, etc. that I was getting.

Then I had problems with the sound which turned out to be because the ribbon cable between the two boards had become loose on the board in the back where I couldn't see it. I unplugged it, plugged it back in, and all was well in Crossbow land.

Thanks again guys for all your help over the years. Seriously!
 
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