+Mitch Posted August 2, 2002 Share Posted August 2, 2002 I hope someone more familiar with the 800 can help me with this. I recently picked up an 800, after replacing the fuse in the power supply, the system now works. Unfortunately, all four of the joystick ports do not work. They all act as if someone is pressing down and a little to the right. The keyboard works fine. Since all of the them are doing the same thing, I am assuming that it is probably a bad chip but I'm not sure which to try replacing. I opened it up and reseated all of the chips. I also checked for cracked solder joints and bad traces but everything looked fine. Any ideas? Mitch http://atari7800.atari.org Quote Link to comment Share on other sites More sharing options...
DanBoris Posted August 2, 2002 Share Posted August 2, 2002 This might be a stupid question, but are you sure your Joystick is ok? Dan Quote Link to comment Share on other sites More sharing options...
+Mitch Posted August 3, 2002 Author Share Posted August 3, 2002 Yeah, I tried two different ones both of which work fine on a 2600. The system really just seems to ignore the joystick, the only thing I can get to work is the fire button (occasionally). It just goes down and a little to the right whether I have a joystick plugged in or not. I figure it's probably whatever chip that interfaces with the joystick ports is going out. I just don't know which chip it is. Mitch http://atari7800.atari.org Quote Link to comment Share on other sites More sharing options...
classics Posted August 3, 2002 Share Posted August 3, 2002 Try swapping out the chip labelled 6520. Quote Link to comment Share on other sites More sharing options...
+Mitch Posted August 3, 2002 Author Share Posted August 3, 2002 OK, thanks for the tip. I don't have one on hand, so it looks like I'll need to put an order in to Best Electronics. Mitch http://atari7800.atari.org Quote Link to comment Share on other sites More sharing options...
somePUNK Posted August 4, 2002 Share Posted August 4, 2002 ok it is what i do when i exsperenc this problem i clean all the pins to tell you the truth it might be the pins Quote Link to comment Share on other sites More sharing options...
+Mitch Posted August 4, 2002 Author Share Posted August 4, 2002 Yes, I was actually going to try cleaning and reseating the chip first before buying a new one. I just haven't had time to work on it again yet. Mitch http://atari7800.atari.org Quote Link to comment Share on other sites More sharing options...
+Mitch Posted September 15, 2002 Author Share Posted September 15, 2002 Try swapping out the chip labelled 6520. Well, it turned out it was a bad 6520. I finally got a replacement from Best and now it's working great. Thanks Classics for the tip. Mitch http://atari7800.atari.org Quote Link to comment Share on other sites More sharing options...
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