A1200 no picture...

@AmiNeo: thanks for the quote for Amibay quote contest!

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thanks for the input back there too...

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:lol::lol::lol::lol::lol:

ROFL! :lol:

Straightens up... That was nice... :lol:

Hey Zeets, did this one ever get revived? I recall giving it to you before I trashed those 600 boards :lol:... Just wondering what became of it?


Ah my Miggy haxxor N00b days... lol.

@AmiNeo

Unforunately my friend, I made a start - with some pics to show some cool *unusual* methods of repair, but its stacked and racked at the moment, along with a lot of stuff in the office/workshop =(

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Originally Posted by Zetr0

@AmiNeo

Unforunately my friend, I made a start - with some pics to show some cool *unusual* methods of repair, but its stacked and racked at the moment, along with a lot of stuff in the office/workshop =(

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Ah okay Z. Shes yours anyways now, was just curious if she ever got up and running again. :thumbsup:

I too have an A1200 that gives no video output.

Over RF, I get black screen and no sound. Over composite (yellow/white/red to SCART cable), I get a black screen, but the sound works normally. I don't have an RGB video cable to test it. I can hear the Frontier intro music, which suggests everything is working normally except video out.

There's something odd on the motherboard, too: someone has soldered the RF modulator and the composite connector at some point. They've replaced the yellow composite jack with a white one like the audio RCA audio connector.

Any idea what this fault could be, or how to fix it? Would an RGB cable work or could it be some larger video fault? (They're ~£17 on Amigakit and that's a lot of money for something that might not work.)

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Originally Posted by JonathanDrain

I too have an A1200 that gives no video output.

Over RF, I get black screen and no sound. Over composite (yellow/white/red to SCART cable), I get a black screen, but the sound works normally. I don't have an RGB video cable to test it. I can hear the Frontier intro music, which suggests everything is working normally except video out.

There's something odd on the motherboard, too: someone has soldered the RF modulator and the composite connector at some point. They've replaced the yellow composite jack with a white onue like the audio RCA audio connector.

Any idea what this fault could be, or how to fix it? Would an RGB cable work ord4 could it be some larger video fault? (They're ~£17 on Amigakit and that's a lot of money for something that might not work.)

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Hmm... My first instinct here would be to blame the capacitors responsible for the video output. Although with you mentioning the boards outputs having been altered I'd be looking more closely for bad connections and such. It's possible that the output has been badly connected to its place.

Maybe a couple of pictures may help determine what has happened to your board...

with no picture on the RF/Comp then its one of three problems

1. VIO (feed) Capacitor(s)
2. CXA1145 (RGB to Luma Croma) *feed RF and Composite
3. DAC (Digital to Analog converter)*

Recently I got smaked in the face with three boards with the latter DAC failure. since you have NO picture from either RF or Composite, I am leaning towards either a feeding capacitor to the DAC or a DAC failure itself.

While the caps are cheap and replaceable, the DAC generally isn't.... irony would have it, for an Uncommon component, its a common fault on some issue motherboards.

Sadly there are as many revisions of DAC as there are revisions of motherboard, each one needing the right version...

I wish I could bring better news.