> From: [EMAIL PROTECTED] > Message-ID: <[EMAIL PROTECTED]> > Date: Sat, 13 Aug 2005 19:39:41 EDT > Subject: Re: [PCI] Number of starts for my 7600 today... > > In a message David Elmo <[EMAIL PROTECTED]> writes: > > << In-Reply-To: <[EMAIL PROTECTED]> > >> Subject: [PCI] Number of starts for my 7600 today... >> From: David Elmo <[EMAIL PROTECTED]> > >> Took 12 starts and restarts to get my 7600 fully booted today. It is so >> fascinating ... and it rocks and is a rock for the rest of the day... >> Yesterday, a miracle and only 3 starts... Average is 4 for last month. >> >> David Elmo > > Today, 15 starts. But Gauge Pro in a spare moment when I have a break, has > come up with a memory error, which might explain all this nonsense that has > been > going on for so long. "Memory Error at address $01FF4AB4 but read $05FF4AB4" > I don't suppose anyone can say how i can usefully use this notice to pinpoint > the chip concerned? If the following gets all unwrapped, I am sorry. > > Memory overview > Disk cache: 8160K > Virtual memory: is off > Built-in memory: 832 MB > > Location Size Memory type > B4 128 MB DIMM > A4 64 MB DIMM > B3 64 MB DIMM > A3 64 MB DIMM > B2 128 MB DIM > A2 128 MB DIMM > B1 128 MB DIMM > A1 128 MB DIMM > External L2 cache: Not installed>> > > ---------------------------------------- > My reply: > > There has been an incredibly good discussion on the G-list last week > concerning the testing of DIMMs with Gauge Pro. > > See these links to G-List archives -- be warned these are very long posts. > > <http://www.mail-archive.com/g-list%40mail.maclaunch.com/msg38676.html> > <http://www.mail-archive.com/g-list%40mail.maclaunch.com/msg38739.html> > >> From these post it is believed the RAM used at startup is either the first > slot, the last slot or possibly both. This theory predates the release of G3's > and should apply to PCI Macs. The G's have only one bank of RAM and most of > our > beloved PCI Mac have two. > > So . . . assuming this premise if correct; I would remove the DIMMs in A1, > B1, A4, B4 and run Gauge Pro again. If 7600 starts up OK and Gauge Pro comes > up > negative you have isolated the bad DIMM to 4 chips. From there you can use the > "sandwich" method as described in the links above to find the defective chip. > > This all assumes (2nd assumption) that your startup problem is a result of > defective RAM. > > HTH --glen
Thanks, Glen. I am pretty sure that was my problem which I am now sorting. I am a no good lazy SOB, my 7600 was in a very awkward position on a shelf under the desktop, no room behind to walk. I preferred to whinge to you lot and get by. But yesterday was Sunday and I yanked it out and transferred the essentials to a 7300 spare case and tested Ram and stuff and by reseating stuff and leaving out a sus stick it now boots first go! I did it in a few hours, hating every moment. The article you mention is good (it does not seem too long to me, I like this stuff). But it is because I know this stuff more or less that I have avoided applying it! It is such a drag to do this - it is like being forced to watch paint dry! There are *some* unknowns to me like which is the first slot (A1 I suppose) and which the last (B4?)... but it does not matter much... I have a test rig in a back room where I can do this time consuming testing stuff and will do this to gain a respectable set of chips over time... These ram software testers cannot so easily pick intermittent faults. A stuck bit can be stuck a bit! What computers need is sophisticated diagnostic testing going automatically in downtime (when user is not working on anything, when no activity for a while). David Elmo -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.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/pci-powermacs%40mail.maclaunch.com/> iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
