could you check it with a meter just to be sure its got voltage.. with leaky caps odd things can happen.
On May 18, 2015, at 4:19 PM, [email protected] wrote: > 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. > 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. 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