faulty video output stfm

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8bitbob
Atarian
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Joined: Sun Apr 15, 2018 10:51 am

faulty video output stfm

Postby 8bitbob » Sun Apr 15, 2018 10:58 am

Hi guys,

Purchased a Atari stfm 520 off eBay other week, worked perfectly until few days back turned it on, display rolls, pixel corruption ,and now just bkank white when booting then maybe flashes when loading games , games loaded up ok.

I did just randomly purchase a new shifter chip off eBay ,but on opening found its was a 1meg stfm and not identical shifter chip.

Not sure that is the problem just went out on a whim.

Any ideas would be most welcome.

Cheers

Ian

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Atari030
Atari Super Hero
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Joined: Mon Feb 27, 2012 6:14 am
Location: Melbourne, Australia

Re: faulty video output stfm

Postby Atari030 » Sun Apr 15, 2018 9:28 pm

G'day, video shifters should be the same across the board. Check the CO number. My first thought would be PSU. I have been working on two mega's doing the same thing. Turned out the PSU was failing. Recap might fix it.

8bitbob
Atarian
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Posts: 2
Joined: Sun Apr 15, 2018 10:51 am

Re: faulty video output stfm

Postby 8bitbob » Mon Apr 16, 2018 7:41 am

Thanks will try that


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