Atari mega st4

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Frode
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Joined: Sat Oct 06, 2018 8:23 am

Atari mega st4

Postby Frode » Sat Oct 06, 2018 8:52 am

Hello

I recently got an Atari mega St4 from a friend.
unfortunately, only vertical lines/garbage appear on the screen when I turn it on.
I have refitted all refittable chips, but no change.
Can anyone point me in a direction, to where to start troubleshooting ?
I´m new to this
Thanks
Frode

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Greenious
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Re: Atari mega st4

Postby Greenious » Sat Oct 06, 2018 10:03 am

https://www.dev-docs.org/docs/

In the left pane, click Mega ST, and the locate the Mega ST service manual in the right pane. That should get you started.

Although the screen problems you describe, do point to RAM/MMU or videoshifter being faulty.
Updated my guides as of june 28th, 2016. Check'em out and feedback!
viewtopic.php?t=5040


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