Well, I can talk about the DVD Drive only. Some Pismos came with the LG Scrap DVD and the rest with a Matshita one. Matshita is a division of Matsushita, which makes Panasonic, National and Technics products. I saw that the LG DVD can be replaced with a Panasonic one (Matshita). Here's the link:
http://www.wegenermedia.com/pismodvd.htm If you send your PowerBook to an Apple Service, they will replace the DVD Drive with a same brand as the replaced one. They don't care what you think about as a lot of people told me, because they still have a lot of stock of LG DVD Drives. They will only give you a Matshita drive if you give them a similar one. --- Hoju Han <[EMAIL PROTECTED]> wrote: > Hi Folks > > I hope these escapades prove informative (and hope > this mail finally > gets through!) > > This is a sequel to my previous Emails (Pismo > Sleeping/Booting Saga) > (e.g. > www.mail-archive.com/[EMAIL PROTECTED]/msg18290.html) > about my PowerBook G3/400Mhz which wasn't reliably > booting and sleeping. > > Fortunately I had AppleCare extended last November > (2003) for two more > years > (A$384). Since then the DVD drive has been replaced > twice (yes the > "reliable" LG > DRN-8080B) and now I have had to deal with this > current repair. > > In short, it turns out, that the 400Mhz processor > module (661-2386, > P3589) had to be > replaced (I could trace down the former number but > the latter number > P3589 seems > mysterious!) which then solved the booting/sleeping > problems; not my > first guess > since the Pismo was running reliably otherwise. > > Anyway, I had been playing with temperature > monitoring (since the > PowerPC 750 > can estimate temperatures on the chip due to its > Thermal Assist Unit > (TAU)) and > had been largely using ThermoInDock (but also the > excellent Temperature > Monitor > (www.bresink.de/osx/TemperatureMonitor.html). > > Normally these temperature monitors (using the TAU > on the PowerPC 750) > indicate > a temperature of around 30-40 Celsius (sometimes a > little more if the > CPU is busy). > However, with the new CPU installed, I am getting > CPU TAU readings of > 90-114 Celsius > (I also have an IBM 40GB GN Travelstar disk with > SMART monitoring with > temperatures > in the range of 25-45 Celsius, of course on chip > temperatures may bear > no relation). > Ambient air temperature is about 20 Celsius (inside > with the heating > on, it is Winter here!) > Some samples: > > Temperature Sensors > Date Time CPU TAU SMART Disk > ------------------------------------------------- > 2004-07-23 08:42:05 +1000 80.00 25.00 > 2004-07-23 09:42:05 +1000 100.00 42.00 > 2004-07-23 10:42:05 +1000 92.00 44.00 > 2004-07-23 11:42:05 +1000 92.00 42.00 > 2004-07-23 12:42:05 +1000 92.00 42.00 > 2004-07-23 13:42:05 +1000 92.00 43.00 > > There is a huge caveat regarding the TAU accuracy: > > "Some older G3 or G4 systems can be equipped with > processors containing > a so > called "Thermal Assist Unit (TAU)". This is a > technique to acquire > temperature > values directly on the chip die and compute it by > the processor itself. > However, > this technology is very inaccurate and only works > correctly if each > processor is > calibrated. Motorola specifies that the readings > supplied by such > processor > types can be off by 12 degrees Celsius (21,6 degrees > Fahrenheit) from > the actual > values. For IBM G3 processors there can even be a > difference of 20 > degrees > Celsius (68 degrees Fahrenheit) between the measured > and the true > values. Due to > this problem, the processor manufacturers have > disabled the TA Units > for later > product generations. Up-to-date versions of the G4 > series no longer > support > temperature measurement on the chip die. Here, real > sensors have to be > used." > > The original processor in the Pismo was definitely a > previous generation > (if the numbers in parentheses indicate generation) > with the designation > PowerPC 750 (83.0) 400Mhz (I think, year 2000 > vintage) while the > current > processor module has an updated numbering: PowerPC > 750 (83.2) 400Mhz. > Ideas? > > I believe that the Pismo uses IBM PowerPC parts > (since the Motorola > equivalent > is called an MPC750) so it might be: > > 1) what I am seeing is a truly inaccurate > uncalibrated number for the > CPU temperature > and it is indeed running at a much lower temperature > (e.g. 40 Celsius). > 2) However the link > www.xlr8yourmac.com/tips/G3_temp.html mentions that > it is possible to install the heatsink on the chip > with poor thermal > conductivity. > So it could be that the CPU is running hot (but > perhaps not as hot as > 90-100 Celsius > because the TAU is inaccurate) due to poor > installation ... Is this > reasonable? > Should I get the AppleCentre to reinstall with more > thermal paste > (assuming they > used any?). > > I am thinking of checking with the AppleCentre where > I hope I can speak > to the > technician who did the reinstall. Or should I just > happily use the > laptop till > it fries. Externally the Pismo doesn't feel much > hotter than normal > (the base > of the unit is always the warmest part) ... Hmmmm > ... what to do ??? > > Reasonable suggestions Welcome! > > Harry. > > > > -- > G-Books is sponsored by <http://lowendmac.com/> > and... > > Small Dog Electronics http://www.smalldog.com | > Refurbished Drives | > -- Check our web site for refurbished PowerBooks | > & CDRWs on Sale! | > > Support Low End Mac > <http://lowendmac.com/lists/support.html> > > G-Books list info: > <http://lowendmac.com/lists/g-books.html> > --> 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/g-books%40mail.maclaunch.com/> > > > > --------------------------------------------------------------- > >The Think Different Store > http://www.ThinkDifferentStore.com > --------------------------------------------------------------- > > > __________________________________ Do you Yahoo!? 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