rudeBSartist Posted August 17, 2015 Share Posted August 17, 2015 Need some help guys, I dusted off my old 4 switch from its 20+ year slumber only to find out that it does not work properly. When I turn it on, sometimes there is a red screen or sometimes just a black creen when it is powered up. I want to try and fix it instead of getting another one from ebay. I replaced the tia, riot and 6507 with tested working ones and I was getting the same results. After some probing I noticed that about 4 of the data lines had a very low voltage. It did not seem like the lines had a short and there was some voltage. What could possibly cause this? Dont want to see this one go; any suggestions would be greatly appreciated. Quote Link to comment Share on other sites More sharing options...
Darren01274 Posted August 17, 2015 Share Posted August 17, 2015 Have you checked the output voltage on the regulator? Quote Link to comment Share on other sites More sharing options...
atari-dna Posted August 21, 2015 Share Posted August 21, 2015 Have you checked the output voltage on the regulator? +1 And your input voltage on the regulator, and at the power jack connection? Also, what does your power supply read just from the wall w/out the Atari connected? Quote Link to comment Share on other sites More sharing options...
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