The little 1/2 aa 3.6v? Yea I replaced it with a new one the day I got the computer.
> On May 18, 2015, at 3:56 PM, Charles <[email protected]> wrote: > > Have you checked the P ram battery should be 3.6 V > > Sent from my iPhone > >> On May 18, 2015, at 12:37 PM, [email protected] wrote: >> >> After washing it it still only shows the gray screen. >> >> I got two SCSI 50 pin hard drives coming in the mail and I am in the process >> of getting capacitors, the 6500 post is about that. So I guess we will see >> what happens after those. >> >> I will also have two more Mac classics as I have some of them that need >> their capacitors changed so I needed capacitors anyways, probably won't hurt >> to recap the other computers either. >> >> >> >>> On May 15, 2015, at 12:27 PM, Jeff Walther <[email protected]> wrote: >>> >>> >>> >>>> On Thursday, May 14, 2015 at 4:05:32 PM UTC-5, Violet Cloud wrote: >>>> Hmm, well it worked once but didn't see the hard drive during >>>> installation. >>>> >>>> Now it won't boot with the floppy or cd at all and will only go to the all >>>> gray screen again. >>>> >>> >>> I would remove the logic board, remove any RAM, etc. and thoroughly wash >>> the board. Many methods are viable. I prefer to spray boards with flux >>> cleaner, give them a gentle scrubbing with an old tooth brush, rinse with >>> 91% isopropyl and then rinse with distilled water. Just washing >>> (scrubbing) with the isopropyl and skipping the flux cleaner works pretty >>> well too. >>> >>> The idea is that the surface mount electrolytic capacitors (look like tiny >>> silver fuel storage tanks) have leaked corrosive, mildly conductive goo >>> onto the logic board. The caps probably need to be replaced, but a >>> servicable interim test which usually works is to thoroughly wash the >>> board. If it works properly after that, then you've stopped any immediate >>> corrosion, you have a (temporarily) working board, and you know that the >>> capacitors definitely need to be replaced. >>> >>> The leakage from the caps is extremely hard to see. It looks a bit like >>> old dried cola, a slight brownish discoloration and is more visible if you >>> view the board at an oblique angle to a light source. Sometimes you'll >>> find dust stuck in the tacky leakage adn that can make it easier to spot, >>> but dust does not always accumulate on the leakage. >>> >>> Pretty much all the 840AVs out there need their capacitors replaced at this >>> point. It's probably true of their little brothers, the 660AV, too. >>> >>> BTW, if the 6100 was missing its ROM it would not make a sound at boot up. >>> If you're getting a good chord or even chimes of error/death, that means >>> that a ROM must be present. Not really relevant any more, given how >>> things turned out, but might be useful to know later. Also, if you start >>> getting mysterious crashes after running for a while, on the 6100, there's >>> a fair chance that the heat sink grease between the CPU and heat sink has >>> turned to powder and needs to be replaced. >>> >>> Given time, such leakage will corrode logic board traces, vias, solder and >>> component pins. >>> >>> Jeff Walther >>> -- >>> -- >>> ----- >>> You received this message because you are a member of 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 leave this group, send email to [email protected] >>> For more options, visit this group at >>> http://groups.google.com/group/vintage-macs >>> >>> Support for older Macs: http://lowendmac.com/services/ >>> --- >>> You received this message because you are subscribed to the Google Groups >>> "Vintage Macs" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >> -- >> -- >> ----- >> You received this message because you are a member of 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 leave this group, send email to [email protected] >> For more options, visit this group at >> http://groups.google.com/group/vintage-macs >> >> Support for older Macs: http://lowendmac.com/services/ >> --- >> You received this message because you are subscribed to the Google Groups >> "Vintage Macs" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/d/optout. > -- > -- > ----- > You received this message because you are a member of 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 leave this group, send email to [email protected] > For more options, visit this group at > http://groups.google.com/group/vintage-macs > > Support for older Macs: http://lowendmac.com/services/ > --- > You received this message because you are subscribed to a topic in the Google > Groups "Vintage Macs" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/vintage-macs/uNdwr-BCBjQ/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > For more options, visit https://groups.google.com/d/optout. -- -- ----- You received this message because you are a member of the Vintage Macs group. 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