Some simple stuff you can try... When you run the disk repair and verification stuff within disk utilities while booted off the OS X install media, does it catch and repair anythi…

...So do I un solder the clamshell batteries to fit the pismo battery board or not. I'm afraid to do that because I do not want to screw something up so bad. Click to expand... …

Lucky, you got the cool iMac where it was user serviceable.

It has been a while, so I could be wrong here, but I think that you also have to change "slot 6" to "my card", otherwise it will assume that you're trying to boot from the internal…

Complete specs: 1.8 Ghz PPC G5, 512 MB RAM, 80 gig HD. I've done nothing to it since buying it, except for the guy at the apple store who inserted the extra 256 stick of RAM. @ Qu…

If you leave it plugged in and off, with the main battery removed, and the motherboard battery plugged in, sometimes you can get a charge into the motherboard battery.

Holy Smokes it works! My gosh, I got it for a steal (literally...well not that I performed anything illegal) cuz it was not powering up. My goodness, thanks readers! Now it needs a…

Make sure that it's nothing to do with this: http://support.apple.com/kb/HT2390 I've already sent in my iMac G5 twice early this year and so far it's running OK. Mine wasn't eve…

I bet your HD is going... FAST... I would go get a replacement. If your iMac doesn't have an iSight it's easy to replace it. If it has an iSight, use my guide...

Some more info would be nice; complete specs, what you've done to it since/before it came slow, etc.

Also, it might be good to read the firewire section of http://support.apple.com/kb/HT1431 [] ]'>

Find the PRAM battery cable, its on the right side under the keyboard right above the back of where the disk drive ends, its a red and white cable. Unplug the battery and try again…

Would a bad internal battery affect it from starting up? Also I plugged the battery in and it doesn't seem to be charging. I'm tempted to think it's a Power unit issue, just wonder…

try lifting the kbd up, and disconnecting the internal battery. the psu is compatible.

It has been a while, so I could be wrong here, but I think that you also have to change "slot 6" to "my card", otherwise it will assume that you're trying to boot from the internal…

I have the Disk Controller II inserted into my socket 6 (using ROM 1 for my Apple IIgs). When I turn the computer on, the disk drive doesn't perform any sort of activity at all, ho…

Very, very rare indeed, so you might reasonably conclude that the weight and stiffness are much more valuable to you in stabilizing your laptop than a tiny, tiny risk of fire from …

Thermal runaway is kind of rare considering how many batteries are out there and how many combusted.

I think the filler is useful to give the laptop increased mechanical stiffness and better balance. And the primary hazard is with charged cells. However uncharged batteries still…

So basically the cells are dead and the memory manager will not let the unit charge at all. There is no problem then using the battery as a space filler in the laptop (which is the…

Thanks for that, Wally. It underscores how much more there is to fear from mistreated lithium cells than from the LHC.

Hacking lithium-ion battery packs is not for the uninitiated. Leave it alone. Click to expand... and how do you become initiated if you dont try ? Click to expand... Fra…

Upon battery insertion the battery manager board, if working, momentarily test charges the cells and looks for approximately 3V= If this is not met charging is disallowed and the…

What's on the battery "board"? Click to expand... The "battery board" provides control systems for "intelligent batteries". The charging controls monitor voltage, current and t…

and how do you become initiated if you dont try ? Click to expand... I think he means "uninitiated" as "someone who has likely never messed with complex electronics before." I …