On 09/20/2002 Paul Miller <[EMAIL PROTECTED]> wrote: > So there I am. Surfing the web via my stock 2400c > (except for the 96mb ram upgrade) and a Farallon > wireless card. It was getting pretty warm sitting on > my blanket (restricted heat dissipation I would > think), but no problems with performance. Then, > without warning, IE hung up with the cursor > clock/wristwatch icon for about 60 seconds..then right > to a fatal error bomb icon/message.
My first CPU failure and prolonged GLOD was under exactly the same conditions. Surfing online creates significant heat buildup from the modem (and more active CPU).. > I clicked on the > restart. The computer restarted (without chime-the > speaker is turned down) but froze at the happy mac. I > forced another restart and the same thing happened. I > unplugged the power plug and then popped the battery > out...of course this lead to the green light of death > (or so I thought). With the batttery out and the plug > in I held the reset button for 60 seconds....it went > off. The CPU has *most probably* suffered electromigration at the poin connections. Reference: ------ Forwarded Message From: Sidney Ho <[EMAIL PROTECTED]> Date: Fri, 02 Aug 2002 14:04:53 +0200 To: "(Duo/2400 List)" <[EMAIL PROTECTED]> Subject: Re: Heat & Electromigration > b) (I must admit I'm a bit paranoid when notebooks heat up too much, The subject of thermal shutdown on 2400s, especially with the Newer G3-240 is a subject I've warned on more than once. The phenomenon that kills CPUs and allows those repair outfits with a surface mount soldering machine (such as DT&T has) is called "electromigration". Electromigration is driven by excessive heat, which is itself exacerbated by bus overclocking or higher backside cache speeds, and leads to progressive failure of potted microcircuits (non-repairable) and soldered pins (repairable). The technically curious can check out this link: http://www.csl.mete.metu.edu.tr/Electromigration/emig.htm ------ End of Forwarded Message > Then the battery went in. I tapped the power > key and the computer resarted, or so I thought. The > computer turns on (the cap light on the yu keyboard > works) and the drive accesses (I can hear it make a > sound like it's "reading")...but then, when the screen > should turn on and the drive should continue to "read" > it just spins and the screen stays off. The powerkey > won't turn it off and a warm reboot is disabled as > well. Some circuits connecting and some not (a "partial" CPU failure which gets progressively worse. But it's the most easily repaired failure. > > So, experts, what is it? Is the board fried, or is it > a hard drive issue? Or what? If it is the drive, > shouldn't the unhappy mac show on the screen? What > gives?? 99% the CPU. Try plugging in a known good one. I've been thru this. > > If I haven't explained this well enough please let me > know what to clarify. > > Thanks, > Paul > ---------- Duo/2400 List, The friendliest place on the Net! A listserv for users and fans of Mac subportables. FAQ at <http://www.themacintoshguy.com/lists/DuoListFAQ.shtml> Be sure to visit Mac2400! <http://www.sineware.com/mac2400> To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> Need help from a real person? Try. <[EMAIL PROTECTED]> ---------- Dr. Bott | 10/100 Ethernet for your 2400 is finally here! MPC-100 | <http://www.drbott.com/prod/mpc100.html> RoadTools $30 PodiumPad available at Apple retail stores, $20 Traveler CoolPad at Staples. Both in white for iBooks at <http://roadtools.com> Midwest Mac Parts ][ <http://www.midwestmac.com> After-market parts for Macs. ][ 888-356-1104 ][ MacResQ Specials: LaCie SCSI CDR From $99! PowerBook 3400/200 Only $879! Norton AntiVirus 6 Only $19! We Stock PARTS! <http://www.macresq.com>
