The vertical stripes problem is almost always a hardware problem. If it isn't a single, thin line straight down the middle, it is caused by a motherboard/ram/rom problem, rather than an analog board problem, assuming that the supply voltages are correct (always check that first!).
The easy things to try are to reseat ram, rom and anything else that you see that can be reseated, so you might as well do that. Perhaps that is the problem in 5-10% of the cases, but a much more common source is leakage of chemical goo from the many electrolytic capacitors on the logic board. The goo is conductive, and as you might imagine, shorting together a bunch of wires at random is not a good thing. Indiscriminate cleaning of the whole board with the dishwasher method seems to work for a lot of folks, as crazy as it sounds. It doesn't heal the capacitors, of course; it just cleans the goo off of the board, so there's always a chance that additional leakage is in the cards for the future. Goo leakage is also responsible for other anomalies, like flaky floppy drive operation, and various sound-related problems. In the case of very weak or no sound, replacement of the output coupling capacitor may be required, because if it's leaked all of its guts out, it can't capacitate any longer. :-) [Most of the other leaking caps are power supply bypass caps; even if a large fraction of them fail, there are generally enough left over to allow the Classic to continue working.] -- Prof. Thomas H. Lee Center for Integrated Systems, CIS-205 420 Via Palou Mall Stanford University Stanford, CA 94305-4070 http://www-smirc.stanford.edu 650-725-3709 ph, -3383 fax -- Compact Macs is sponsored by <http://lowendmac.com/>. Support Low End Mac <http://lowendmac.com/lists/support.html> Compact Macs list info: <http://lowendmac.com/lists/compact.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/compact.macs%40mail.maclaunch.com/> --------------------------------------------------------------- >The Think Different Store http://www.ThinkDifferentStore.com ---------------------------------------------------------------
