Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!linus!philabs!sdcsvax!sdcrdcf!bmcg!rasp From: rasp@bmcg.UUCP Newsgroups: net.micro.atari Subject: Re: Troubleshooting Advice - (nf) Message-ID: <379@bmcg.UUCP> Date: Mon, 13-Jun-83 14:48:06 EDT Article-I.D.: bmcg.379 Posted: Mon Jun 13 14:48:06 1983 Date-Received: Tue, 14-Jun-83 16:43:27 EDT References: harpo.1785 Lines: 21 I have heard of others with the same trouble, a wavy line walking up the screen, so I'll broadcast an answer. The problem seems to be a "retrace snake". This would be caused if the ATARI were superimposing 60Hz onto the video signal. You might note that the frequency exhibited by the "snake" is that of the difference between 60Hz line frequency and the vertical refresh rate which is quite close. Look for any source of 60Hz. Bad grounding is certainly a candidate; but, the most likely culprit is something gone bad in the ATARI's power supply. If you have access to the appropriate tools, check for either a bad rectifier, a bad filter cap, or a bad regulator. If you're lucky, there is even the possibility that the problem is as simple as the end of the video cable that is plugged in INSIDE the case has partially worked loose and needs only to be reseated. Please let me know how you make out. Ron Perloff Burroughs Corp 16464 Via Esprillo San Diego, CA 92128 619-451-4519