hef9800
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Join Date: February 11th, 2019

Last Activity: February 14th, 2019 05:29 PM

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February 13th, 2019, 10:32 PM

hef9800 replied to a thread Atari 400 has power led but no signal to tv in Atari

So I feel like a dummy, I had the chip in the Z503 socket backwards since I had it out to resolder the piggy back chip on it and didn't noticed it...

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5 replies | 164 view(s)
February 13th, 2019, 03:26 PM

hef9800 replied to a thread Atari 400 has power led but no signal to tv in Atari

I have no noise and the tv isn't receiving any signal. I also checked the chips and reseated them and found no corrosion either. I tested the...

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5 replies | 164 view(s)
February 12th, 2019, 09:22 PM

hef9800 replied to a thread Atari 400 has power led but no signal to tv in Atari

It's the non-official mod by Claus Buchholz with the hand written schematics. I shall do that and check back.

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5 replies | 164 view(s)
February 11th, 2019, 04:03 PM

hef9800 started a thread Atari 400 has power led but no signal to tv in Atari

Hey everyone. I have an Atari 400 that I modded to have 48k of ram. It worked great on my test bench, played some games on it with the top plastic...

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5 replies | 164 view(s)

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Last Activity: February 14th, 2019 05:29 PM

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