If it doesn't work, I have a Classic II mobo available.
On 7/16/04 4:18 PM, "Tom Lee" <[EMAIL PROTECTED]> wrote: >> The vertical line problem is ussually blame of the analogue board, but it can >> also (sometimes) be produced by a faulty logic board or a loosy or otherwise >> problematic connection between both boards. Exchange the boards and see what >> happens. Check the two ends of the 12-pin cable tat connects both boards, and >> see if there are cold soldiers. Resolder it if neccessary. If that doesn't >> help, it's not too difficult to fix the a/b (see >> http://www.jagshouse.com/classicrepair.html - it talks about the SE/30, but I >> think the Classic's analogue board is simmilar enough for those instructions >> to >> fit it). > > The vertical line problem in all classic compact macs is almost *always* > caused by one > of just two things: > > 1) Bad solder joints (or bad connector pins) where the 4-pin yoke connector > connects > to the analog board. > > 2) Bad 3.9uF/4.7uF nonpolar electrolytic cap (the tall one, usually fixed in > place > with an ugly dollop of hot glue). > > To fix 1), resolder (with *fresh* solder; don't just reheat) the four solder > joints. > Leave the connector hooked up to prevent heat from deforming it. Then, > disconnect the > connector and carefully inspect both sets of 4 pins. If any look burned, > either > replace the connector, or bypass it altogether by hardwiring. > > To fix 2, replace the capacitor with a low-loss ("low ESR") *nonpolar* > capacitor. > These can sometimes be hard to find, or expensive (or both). I've had very > good > success simply putting 4 1uF ceramic capacitors in parallel. These are cheap > and > readily available. > > Good luck! > --Tom > > -- > 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 ---------------------------------------------------------------
