>Hi listers, > >when I started up my Classic II this evening it gave me an amazing concert >I never had heard before: A high-pitched whine growing louder as it came >down in pitch, turned to some kind of pinK noise, then to a stuttering, >crackling noise, then it went back up in pitch again until it was nearly >unhearable; after about ten minutes it disappeared completely, the ghoul >was gone. ISTR an earlier thread on this subject stated that there were >some capacitors on the analog board going south that could cause that >sound; in another instance (CC II) Jeff said it could be the hard drive or >the video circuits where failing components could make oscillations audible >that were otherwise above the human hearing range. Does anybody know the >exact explanation for the Classic II or can anyone identify the culprit(s)? >I stand by with my soldering iron... >
You didn't say if the Classic was working or not, was there anything on the screen? You could elimate a lot of things by disconnecting everything inside that is not essential like the hard drive, floppy drive etc. so you just have analog board and logic board connected up, ensure the anode cap is clean and connected correctly and make sure the joints on the analog board are all good. Look especially around the Flyback transformer and the capacitors. Regards Sean. -- 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 ---------------------------------------------------------------
