Here's an update: We temperature measured my freezing PB G4 / 400 running with an alternative HD. We used an external multimeasurement device with a cable attached to the heatdissipator. The temp reached 66�C before the fan went on ( I had to use 2 movies running in VLC and QT player as well as coding a 20minute piece to AAC in iTunes keep the temp rising for about 90 minutes). The temp dropped to 52�C and the fan stopped. So there went my fan-not-running-mustbe-heatproblem theory. OK.
So I took my old HD, that have been working error free in a PB G4 550 for the last week, and put it in my -book and booted. The move took about 15 minutes and the machine naturally cooled off. It frooze at the login screen! Further proof that this freeze problem is unrelated to heat, right? I did a hard restart and could login and 5 minutes later it frooze again. At this point I decided I could deduce that excessive heat wasn't casuing the problem and further the fan is actually working. I then put my HD over in the 550 again and here it works without freezing. Again. So I'm going to run my machine with the other HD and if the freezing stops, then there must be something fishy about my drive (30 GB IBM Travelstar). But if so, why does it work in the 550? I'm using my HD in that machine now. Something to do with differences of internal power tolerances? I'm not sure at all, but all of the above is repeatable. There are no logical errors on the disc that I can detect with software, and it seems unlogical that logical errors on the disc would cause problems on one machine and not on another? Or am I wrong? Any further suggestions and even wild speculation are more than welcome at this point. What data can I measure with my disc? It has SMART. Can that help me? Mikael Bystr�m said: >Noone have any insights on this type of problem with a Powerbook G4 >suddenly start to freeze after using a firewire disc? (See both earlier >posts further down for details) > >If not, anyone care to say anything on strategy for measurement of >temperature and other useful data? I've fixed simpler problems with the >PB G4, more complicated problems in the wallstreets and Pismos, but this >kind of freeze problem in a PB G4 is new to me. > > > > >Mikael Bystr�m said: > >>It just got Worse! >> >>Three times since this drive encounter my whole machine have frozen 4+ >>times. It just freeze and there is nothing you can do except the three >>finger salute. There is no log of anything in the OS, indicating hardware >>failure. I did a Open Firmware set defaults, reset nvram & reset all. >>This didn't improve anything. >> >>Then I popped up the keyboard and discovered that the connection cable >>from the PCMCIA slot had been disconnected from the motherboard. I >>reinserted it hoping this would solve matters. >> >>I think it froze four times since, one of them booting into single mode >>and stopped just after the first 20 lines. >> >>All of this because I pop in a firewire drive during sleep? Or did it >>just cause already broken things to surface? The new thing with the drive >>was that it was the first firewire unit I have used that needed bus >>power. Maybe this put some toll on the motherboard or something? >> >>Hmm, one thing I seem to notice is that my fan isn't running as far as I >>can tell. Maybe it stopped? How do one force start the fan? Will the >>Apple hardware test CD, that came with the machine, test the fan? If it >>doesn't, then maybe this is a heat problem? Any ideas on how to verify >>the fan operation or other ideas to solve this problem? >> >> >>I tried Temperature Monitor, but unfortunately only the HD SMART >>controller is supported on my Powerbook G4 400 and I noticed that when >>crashes occur the temp is 43� C/109.2�F after rebooting. The first >>troublefree time it's at 39�C to 42�C. >> >> >>Mikael Bystr�m said earlier: >> >>>Anyone know what this can be about? >>>I sleep my TiBook 4oo with powercord in, insert a cordpowered >>>firewiredrive and the machine refuses to wake up. It's not off, but HD >>>seems to not spin up, just kinda "sims about" and display is dark. >>>Three finger salute with drive disconnected, machine boots up and just >>>before logging in I sleep it again, inserts the drive, it wakes up and I >>>login and copy my files, eject the drive, sleeps it again, remove the >>>drive and now the machine plays dead again. Another forced restart and >>>everything is normal. >>> >>>Now, what conclusions are the to make here? I couldn't find much in the >>>system log. -- 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/> --------------------------------------------------------------- iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com ---------------------------------------------------------------
