Hi, The high-frequency wheening and clicking sounds are from your hard drive. I guess it's dead now. Probably due to age or frequent power loss. The logic board of the Mac Portable has the same issues as seen with SE/30 and Classic II logic boards: failing SMD capacitors. They need to be replaced. However I had mixed results with just replacing all the capacitors only as in this case the voltage regulators and diodes also seem to fail. Eventhough you don't see any fluid leaking from the capacitors yet, some of them will probably already be shorted with is causing the board to fail. Nico _____
Van: [email protected] [mailto:[email protected]] Namens Britt Dodd Verzonden: dinsdag 4 augustus 2009 5:14 Aan: [email protected] Onderwerp: Re: Mac Portable Problems Thats one of the issue im having with 80% of my boards -- due to 20 years of old capacitors. I'm gathering parts now to rebuild mine. I have two systems and a handful of boards. Is yours backlit or non-backlit? On Mon, Aug 3, 2009 at 6:12 PM, platnicat <[email protected]> wrote: Thanks Britt! My board isn't leaking at all, your PMU reset worked great! But... Now I've got another problem. My 40MB internal HDD (40SC) and previously dead 1.44/800K Floppy drive are both gone. A working mac... with no boot media! What Now? The HDD makes a noise that sounds like *high pitched squeal* click, *high pitched squeal* click, *high pitched squeal* click, etc. > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/vintage-macs?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
