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| Author | Powerbook 3400C Battery Charger only slightly warm. (Read 9517 times) | ||||||||||||||||||||||||||||||||||||||||||
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BigBang
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on: June 11, 2007, 04:27
Hi, My recently purchased PB3400C was working fine and I wiped the HD, re-installed 7.6, then updated to 7.6.1, following the instructions on this website. The battery holds very little charge, but while I had it connected to the mains the PB suddenly displayed an alert, advising it was low on backup battery power and would be shutting down in 5 seconds. I thought this odd as I was using the mains! I have seen a low power alert twice. Yesterday I picked up the mac while the lid was up .... it made some whining noises then turned off and I saw some red static lines on the screen when I tried to start it again. It seemed to start it up properly, but when I booted from the install disc to run the First Aid program the PB just shut down and wouldn't revive. I tried to reboot it and often heard the whining sounds after the chime or saw the green sleep light was constantly glowing, which I then pressed the reset button to no avail. Then it just stopped responding. During my many attempt to revive it I noticed the sleep light was constant so I reset it via the switch on the rear panel. I waited for the RAM to be checked after resetting it but still nothing. After a few attempts to start it I often heard whining and scratching sounds after the chime. I wiggled the power cord at the back and this seemed to affect things slightly, giving me the chime once or twice as I wiggled and pressed the power button. I left it on all night and in the morning the battery recharger box was only slightly warm, not hot to touch at all. I realise the HD might be dead or dying but I simply want to understand what other possibilities these symptoms point to. I feel I've done all I can but don't want to toss it away until I at least get some feedback on it. |
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dpaanlka
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1024 MB  Posts: 1646 
Reply #1 on: June 11, 2007, 06:30
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3400s sometimes have power management unit (PMU) failures. I know mine did and it acted crazy until I replaced it.
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wove
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1024 MB Posts: 1363
Reply #2 on: June 11, 2007, 06:38
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These are the instructions from Apple for reseting the Power manager on the 3400. "1. If the computer is on, turn it off. 2. Restart the computer by holding down the reset button for 10 to 20 seconds. (See chart above for location of the reset button for your PowerBook series.) 3. If the computer does not restart, repeat step 2 three or four times." A bad battery can draw so much power that it overwhelms the charger resulting in low power warnings. You might try running the 3400 with no battery installed to see if you still have the problems. A component failure can also cause the problem. bill
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dpaanlka
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1024 MB Posts: 1646
Reply #3 on: June 11, 2007, 06:56
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If it continues to give you troubles when the battery is inserted, but you don't want the ugly look of having no battery, perhaps try covering the battery contacts with electrical tape? That way you can use the computer plugged in *without* the battery, but still have your battery inserted.
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BigBang
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Reply #4 on: June 11, 2007, 07:50
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Hi & thanks for your replies! I tried holding the reset button for 10-20 secs a few times to no avail. I tried this with the battery in/out but couldn't resucitate the PB. I was just starting to enjoy my newfound experience but I guess there's nothing else to try? This website has been outstanding in helping my transition from X to 7.
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dpaanlka
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1024 MB Posts: 1646
Reply #5 on: June 11, 2007, 08:19
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Quote from: "BigBang" This website has been outstanding in helping my transition from X to 7. You had X on your 3400c? Anyways, really glad you're finding this site useful.
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BigBang
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Reply #6 on: June 11, 2007, 08:26
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Nooooooo! I'm running 10.4.9 on my desktop core 2 duo and had just uncovered the joys of OS 7.6. lol ... my bad ;p
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dpaanlka
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1024 MB Posts: 1646
Reply #7 on: June 11, 2007, 08:57
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Ah yes, so Mac OS 7 is supplementing your X computer. That's the setup that many of us have.
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BigBang
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Reply #8 on: June 11, 2007, 09:00
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I just pulled out the PRAM battery and noticed some mildewy white stuff on the logic board directly underneath. Here's the link to ImageShack to view the photo. (http://img247.imageshack.us/img247/8343/img0436on6.jpg) Any ideas on what to do next? I plan on just popping in all those components again in the hope that miracles will happen. What about the condition of the logic Board???
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dpaanlka
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1024 MB Posts: 1646
Reply #9 on: June 11, 2007, 09:06
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Quote from: "BigBang" (http://img247.imageshack.us/img247/8343/img0436on6.jpg) Yikes! I don't know exactly what that is, but it sure looks like it probably is involved with your problem. Possibly some sort of corrosion caused by a leaking battery?
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BigBang
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Reply #10 on: June 11, 2007, 12:10
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Well after putting it all back together again it still is as dead as a doornail! I spent so much time researching about System 7 and how to update to 7.6.1 and was able to get online and even networked my iMac C2D, iBook Clamshell 466mhz and this Powerbook 3400C, which was a major achievement for me! Oh well, ce cera cera I guess .... back to OS X ...
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