Redcurrie #1 Posted November 11, 2003 Okay, last week, I fixed my one 2600 by switching out the TIA with a working one from another unit. I got in another TIA to resurrect the "donor" unit and screwed up and put it in backwards. I got colored static when I cut it on, realized my mistake and turned it around. Now all I get is a black screen. I also bent whatever the gray thingee situated to the top left of the TIA was so it may be that. Any suggestions?? Can you "blow" the TIA by doing that or does it damage something downstream? What is the gray thingee, could that be the problem, and if so, how do I fix it? Thanks! Laura Quote Share this post Link to post Share on other sites
Ian Primus #2 Posted November 11, 2003 The gray thingee is probably the clock crystal. Provided that you didn't break it off, it should be fine. As for the TIA, it's probably fried if you put it in backward, since the power input would no longer be feeding into the power input pin, so it probably burned it out. I would imagine that the rest of the Atari is still working, since the TIA would have been the only part affected, but then again, it could have fed power through the bus to the other chips, so I don't know. I'll have to look at the pinouts of the TIA to figure out what might have happened. Ian Primus [email protected] Quote Share this post Link to post Share on other sites
povlok1 #3 Posted November 11, 2003 one day while tinkering I purposly installed all the chips (each one at a time) backwards just to see if they would blow (I have about 200 atari's so I can afford to play;P) I was not able to blow any of the chips that way.. but this was me.. Take a CLOSE look at your pins, make sure they are all properly seated Quote Share this post Link to post Share on other sites
vanman #4 Posted November 11, 2003 What does colored staic look like? Quote Share this post Link to post Share on other sites
Redcurrie #5 Posted November 11, 2003 What does colored staic look like? Well, on my TV, it was black, white, red and green instead of being black, white and gray...... Quote Share this post Link to post Share on other sites
Ian Primus #6 Posted November 11, 2003 I've never plugged a chip into an Atari backwards, but I know what happens if you connect TTL logic chips backward. They get really hot, and generally are destroyed, since the +5v pin is now connected to ground, and the ground pin is now connected to +5v. In general, hooking things up backward is a Bad Thing. Based on this, I would imagine that the TIA is likely blown, but check the connections to the component you bent down, and make sure there aren't any short circuits, and that the things that are supposed to be connected are still connected. Also make sure that the TIA is properly seated in it's socket the correct way around. If it still doesn't work, you can try once again swapping parts from a working Atari, to verify that the rest of your parts still work. I wouldn't imagine that the rest of the Atari was damaged by plugging the TIA in backward, but I'm not sure. Good luck. Ian Primus [email protected] Quote Share this post Link to post Share on other sites
Redcurrie #7 Posted November 22, 2003 Based on this, I would imagine that the TIA is likely blown, I finally got another TIA, plugged it in and voila, a working unit. Once again, thanks for all of the help! Quote Share this post Link to post Share on other sites
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