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Does it need to be desoldered, or can it be dumped by reading it over NuBus?

$4244 is the HFS filesystem signature, try Inside Macintosh volume IV, chapter 19, "File Manager".

Good find on the datasheet. On the first page, in the lower left quadrant, it says that the "E2" is the lot number, which we can ignore, and the "UD" is the "series", which is the specific model line of capacitors from this manufacturer. It also says that the "470" is the capacitance code and...

A quick look at the console5 site shows that that particular kit is for the logic board only, not the analog board, but that they supply analog board kits as well... but that you will need to find the appropriate kit for the specific model of analog board that you have.

Surface-mount electrolytic capacitors are round, with a square plastic base with two corners cropped (forming a rough D-shape). They are shipped in plastic packaging designed to fit on a reel (for use with "pick and place" machines) that happens to have a square recess for holding the capacitor.

There's another aspect to these air-cooled G5 systems: They always run the fans at max when the side panel is open, but if they're buttoned up then they will be a bit more dynamic about airflow management. That was a surprise to learn back in the day.

My own thought would be to conductive-epoxy the pad back down (or, if it's completely torn off and you lose it, conductive-epoxy down some copper tape), solder a bit to bridge to the existing copper, and then maybe the UV coating. That said, conductive epoxy is Not Cheap, and this doesn't look...

A sector-wise copy of the entire drive is my baseline for imaging hard drives. With a license manager in play, though, I'd be concerned about it checking manufacturer names, models, serial numbers and whatnot on the host system, any network cards, and the drive itself. If you have any...

Apparently, my iBook G4 is running Debian Wheezy (7.6) with XFCE. It was probably current when I last used the machine.

Okay, so that's the ADB power-switch (as opposed to +5v source) connection. That would prevent using ADB power buttons to turn the computer on, but I doubt that it would cause chimes of death. The iffy-looking R2 trace that I called out looks like it goes to the negative side of C7, which is one...

Looking at the bomarc IIfx schematic, R4 is on sheet 1 of 8, right next to connection point C (to sheet 2), this is part of the power-switch and ADB functionality. UB16, which I think is that black box with the wire segments poking out the top, is a dual inductor that's one of the last stages of...

On this topic, kapton tape is heat resistant. Wide pieces can be used to protect plastics and components that you don't want to accidentally melt or desolder when you're using hot air. Or tape down something to use as an air (and heat) shield. Hot air alone can be fairly indiscriminate.

My worst lifted-and-torn-pad repair, I ended up buying some two-part conductive epoxy (MG Chemicals 8331, not cheap), cutting pieces of copper tape the size of the pads that needed replacing, and using kapton tape to both help to position the replacement pads and hold them down while the epoxy...

While I'm thinking about it, one other check, this one while the machine is powered up: Check the voltage levels relative to ground on both sides of the inductor.

Okay, the (apparently bomarc?) schematic that someone pointed me to says that pin 11 on the floppy connectors runs to the positive side of C196/C205 (one or the other), clearly decoupling, and also runs through L12 (an inductor, damps noise on the power rail) to the 5v supply. So, check...

Okay, next phase is to check the internal floppy connectors, J16 and J17. Pins 14 and 20 shouldn't be connected to each other (20 is a no-connect generally, and 14 is drive select), but the others should show continuity (though you might have trouble measuring that for the odd-numbered pins...

Looking at my IIfx, the white PSU wire is pin 15, and that's the line that you use to jumpstart the supply if there's something wrong with the startup circuit. Case to pin 1 (yellow): 11v9 Case to pins 2, 3, 4, 5, and 6 (red): 5v13 (+/- 0.01) Case to pins 7, 8, 9, 10, 11, and 12 (black): about...

The Mac-II era startup circuit is weird. There's no standing voltage from the PSU, but if you supply +5v (apparently +3.6v is enough?) to one of the pins it powers up.  If you then ground that pin, it powers down.  The reason why the II has two batteries when one is sufficient to hold the PRAM...

Three or four AAA batteries in a holder plus some wire might also do the trick (you'll be at 4.5v or 6v, I don't know how close you need to get to 5v here). Or if you have another machine that uses 5v (say, a PC?) you could bridge the grounds and then tap the 5v from that for a second. Or wire...

Having my own II-series startup issues (IIfx in my case), I have to ask... have you tried "jumpstarting" the PSU with a separate +5v supply?  That's step one, and should tell you if you need to focus on the PSU or the mainboard.