Chad, Thanks for your response.
When the power supplies, internal HD and floppy sled were removed on both Mac IIci(s), the batteries were checked in both CPU(s). They registered 3.5 and 3.6 volts respectively. I understand but have no specific knowledge that when a PRAM battery dies, you iwll not get a peep out of the Mac or the sad face will be visible. I got a 'peep' out of the Mac and do not know why but when I get a staging area set up in a soon to be vacant room in our house, I shall certainly explore the problem. MEl --- Chad Thompson <[EMAIL PROTECTED]> wrote: > What about clock/nvram battery? > > I have a 4400 which wouldn't start up until a new > battery was in place. > > Chad > > > > Mel wrote: > > Jeff, > > > > Thanks for your advice. > > > > I have several spare Mac IIci(s). > > > > Tried switching off the power strip, switcing it > on > > and then wihtin a second or two hitting the on > switch > > separately form the keyboard and then from the > switch > > on the rear of the CPU. Nohting. > > > > Pulled the power supply from a unit that was known > to > > be working and R&R with the power supply in the > CPU > > that was not working. No soap. > > > > Finally R&R the internal drive with my data and > > software and swapped it into another IIci CPU. > Booted > > up and everything works. in other words, I gave > up. > > > > However, I shall use your advice on the CPU that > was > > not working and experiment by trying some of the > fixes > > you suggested to see if I can make it operational. > > > > Thanks for the tips and the benefit of your > > experience. > > > > Mel > > > > --- Jeff Walther <[EMAIL PROTECTED]> wrote: > > > > > >>At 15:30 -0400 08/04/2005, System6 wrote: > >> > >>>Date: Thu, 4 Aug 2005 06:34:58 -0700 (PDT) > >>>From: Mel <[EMAIL PROTECTED]> > >> > >>>This morning, when I hit the start button, the > >> > >>three > >> > >>>lights above the three buttons (num lock, caps > lock > >>>and scroll lock) and the green light at the lower > >>>right of the CPU came on simultaneously; the CPU > >>>emitted a very short chime but the CPU never came > >> > >>on > >> > >>>nor did the monitor. > >> > >>First, you'd probably have better luck with this > >>question on Vintage > >>Macs list, because it is a hardware question, not > a > >>System 6 question. > >> > >>Second, there are two possibilities. You could > have > >>a failed power > >>supply or a failed motherboard. > >> > >>Power Supply: I don't remember the details, > >>unfortunately, though > >>some time with Deja News might pull up relevant > >>posts, but there's a > >>fairly common failure mode for the power supply > >>which, IIRC, may > >>cause this issue. > >> > >>Logic Board: On these old logic boards the > >>electrolytic capacitors > >>leak and the leakage is corrosive. Pull the LB, > >>examine it closely, > >>holding it at various angles to the light and look > >>for discolored > >>areas (brownish) in the rear right corner. If you > >>find some, clean > >>it up with swabs and isopropyl (rubbing) alcohol. > >>Examine the area > >>carefully for pitted and corroded leads and > solder. > >>You may find > >>connections that are eaten through. An ohmmeter > >>(continuity meter) > >>is handy for this examination. > >> > >>Some folks have had luck simply cleaning the > >>corrosive off, but for a > >>good fix, you need to remove the old caps and > >>replace them, > >>preferably with tantalum caps which won't leak. > >> > >>The surface mount electrolytic caps are the little > >>round silver cans > >>on teh board. There's about a dozen fat ones > >>(~1/4") and a handful > >>of thin ones (~1/8"). > >> > >>Marc Schrier's Clock Chipping Home Page has > >>instructions on removing > >>surface mount resistors using the two soldering > >>pencil method and > >>this is relevant to remving SM caps as well. > >> > >>Replacement caps in tantalum or electrolytic are > >>available at > >>Digi-key and other places. > >> > >>The unfortunate fact is that a huge number of > these > >>grand old > >>machines are experiencing this type of failure. > >>We're seeing a lot > >>of the SE/30s with the same problem over on the > >>Classic Mac list. > >> > >>I had this failure in my IIci back in the mid-90s > >>when a IIci was > >>still worth close to $1000. I had to bypass a > >>corroded via (a hole > >>that takes a connection from front to back of > >>circuit board) with a > >>bit of wire wrap to fix mine. > >> > >>Jeff Walther > >> > >>-- > >>System6 is sponsored by <http://lowendmac.com/> > >>and... > >> > >>123Inkjets.com > >><http://lowendmac.com/ad/123inkjets.html> > >> > >> Support Low End Mac > >><http://lowendmac.com/lists/support.html> > >> > >> System 6 Heaven > >> > > > > > <http://www.euronet.nl/users/mvdk/system_6_heaven.html> > > > >>System6 info: > >><http://lowendmac.com/lists/system6.html> > >> --> AOL users, remove "mailto:"; > >>Send list messages to: > >><mailto:system6@mail.maclaunch.com> > >>To unsubscribe, email: > >><mailto:[EMAIL PROTECTED]> > >>For digest mode, email: > >><mailto:[EMAIL PROTECTED]> > >>Subscription questions: > >><mailto:[EMAIL PROTECTED]> > >>Archive: > >> > > > > > <http://www.mail-archive.com/system6%40mail.maclaunch.com/> > > > >> > > > --------------------------------------------------------------- > > > >>iPod Accessories for Less > >>at 1-800-iPOD.COM > >>Fast Delivery, Low Price, Good Deals > >>www.1800ipod.com > >> > > > > > --------------------------------------------------------------- > > > > > > > > > -- > System6 is sponsored by <http://lowendmac.com/> > and... > > 123Inkjets.com > <http://lowendmac.com/ad/123inkjets.html> > > Support Low End Mac > <http://lowendmac.com/lists/support.html> > > System 6 Heaven > <http://www.euronet.nl/users/mvdk/system_6_heaven.html> > > System6 info: > <http://lowendmac.com/lists/system6.html> > --> AOL users, remove "mailto:"; > Send list messages to: > <mailto:system6@mail.maclaunch.com> > To unsubscribe, email: > <mailto:[EMAIL PROTECTED]> > For digest mode, email: > <mailto:[EMAIL PROTECTED]> > Subscription questions: > <mailto:[EMAIL PROTECTED]> > Archive: > <http://www.mail-archive.com/system6%40mail.maclaunch.com/> > > --------------------------------------------------------------- > iPod Accessories for Less > at 1-800-iPOD.COM > Fast Delivery, Low Price, Good Deals > www.1800ipod.com > --------------------------------------------------------------- > -- System6 is sponsored by <http://lowendmac.com/> and... 123Inkjets.com <http://lowendmac.com/ad/123inkjets.html> Support Low End Mac <http://lowendmac.com/lists/support.html> System 6 Heaven <http://www.euronet.nl/users/mvdk/system_6_heaven.html> System6 info: <http://lowendmac.com/lists/system6.html> --> AOL users, remove "mailto:"; Send list messages to: <mailto:system6@mail.maclaunch.com> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/system6%40mail.maclaunch.com/> --------------------------------------------------------------- iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deals www.1800ipod.com ---------------------------------------------------------------
