IMac still tkaing off!

Okay i posted a few weeks ago about my imac taking off even though i had only brought it a day before, every time i shut it down it refused to shut down, screen goes black and then the fans just boot in and sound like theylll lift the mac into the air!
I did the permisons repaired and etc and pram and something when i take the power out and put it back on while holiding the power key. They jsut ahvent worked.
So i thought i was sorted... but it keeps showing the problem. So i checked up on the Console... and i worked out that i was having the problem with the USB modem causing trouble in my panic.log. So i changed the port it was in and it worked.
But now its started again!!! But the console is still showing for this occasion in panic.log that it is the usb modem. Here is the report that the log shows.
Tue Jan 17 13:08:43 2006
panic(cpu 0 caller 0x0009A0F8): mapping_remove: hwremmap failed - pmap = 00364000, va = 0000000000002000, code = 00CF0102
Latest stack backtrace for cpu 0:
Backtrace:
0x00095718 0x00095C30 0x0002683C 0x0009A0F8 0x000991B0 0x000627F0 0x000A81F8 0x000ABD00
Proceeding back via exception chain:
Exception state (sv=0x253B4780)
PC=0x005C7F94; MSR=0x00009030; DAR=0x00002DC0; DSISR=0x0A000000; LR=0x005C31B0; R1=0x0CE4BD20; XCP=0x0000000C (0x300 - Data access)
Backtrace:
0x01420C7C 0x005C31B0 0x002D28A4 0x0003C744 0x000A9894
Kernel loadable modules in backtrace (with dependencies):
com.globespan.gwausb(1.2.1)@0x5bb000
dependency: com.apple.iokit.IOUSBFamily(2.2.8)@0x43a000
dependency: com.apple.iokit.IOSerialFamily(9.0.0d30)@0x4b4000
Exception state (sv=0x24EEBA00)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
Kernel version:
Darwin Kernel Version 8.4.0: Tue Jan 3 18:22:10 PST 2006; root:xnu-792.6.56.obj~1/RELEASE_PPC
So does anybody know what i could possibly do to sort this problem out. Thanks

Hello
you could try an SMC reset
1- unplug all cable
2- push power button for at least 5 sec
3 - plug power cord - keyboard - mousse and restart
HTH
Pierre

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My iMac turned itself off this morning; all I was doing was typing, nothing intensive. It wouldn't turn back on.
I first got a wired keyboard and mouse and tried resetting the SMC. No success.
Next I took out and put back in the RAM (and it was unplugged). After repeatedly pressing the power button, I got a single beep out of it. I personally don't think it was high enough of a pitch, but I read that it might've been because the computer didn't read any RAM.
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The third time, the fans came on and half of the dong played, but it was cut off.
The forth time the dong fully played, but a second after, it turned off again.
All of these times involved unplugging the computer for a few seconds and then repeatedly pressing the power button; I might've taken the RAM out all of the times too, but I don't remember now.
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The computer turned one year in August 08, and there's no AppleCare. Even though the warranty's gone, would Apple have any negative view if I opened it up to get my HDD? I can get the screen off with three house suction cups; my HDD was last backed up four days ago, and of course, I had just typed about 3000 words for a story I'm working on between last night and this morning.
And lastly, if I make an appointment with the Apple Store (two hours from here...) and they want to take it in, will they take out my HDD right there and give it to me if I don't take it out? Four days is so tremendous in this situation. I will not part with my HDD.

Perhaps. While I guess they're certified, I still trust Apple the most. Also, if it is a logic board problem, and it is widespread, hopefully this could be free. I don't know how a reseller would handle such a situation. I just want a file off my HDD!
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My original battery wore down to the point where it would not be recognized as available and the computer couldn't power on without shutting down in a few minutes. I ordered a replacement battery, certified Apple genuine, but after 3 days it reached about half charge and the computer died, not turning back on without the adapter. When it did reboot the battery was at 0% and not charging, and the computer was incredibly slow and laggy.
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FinchDrive wrote:
I just finished running the AHT and an extended test. Hardware error pointing to the battery on both:
4xxx/40000005: "Battery"
and 4xxx/4/40000005: ◊òä "Battery"
upon the extended test.
Do these codes refer strictly to the battery, or to possibly other components that interact with it?
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If that is actually what was generated by the AHT, then I am a bit surprised.
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http://eshop.macsales.com/item/NewerTech/BAP15MBU78W/
Based on the reputation of the company, I personally would be willing to try their non-Apple branded replacement. I have dealt with them a fair amount, so my statement is from experience. Note that is has a 1 year guarantee as do the Apple batteries. ( I will need a replacement for my 2010 MBP and I will probably purchase it from them)
Ciao.

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Note: The information provided in the link(s) above is freely available. However, because I own The X Lab™, a commercial Web site to which some of these links point, the Apple Discussions Terms of Use require I include the following disclosure statement with this post:
I may receive some form of compensation, financial or otherwise, from my recommendation or link.

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