Older Apple G3 'uglee' won't boot

They are G3s, it says so right on the box. They are like nothing I've ever seen before: boxy, with perforated tops. (Hey, Appaloosa Mac Man, is this something you've seen?) It says "All In One" on the fronts, and there is a detachable rainbow Apple logo on the sides (one is missing the logo). Monitor, ZIP drive, and all else except keyboard are built right in. No USB keyboard connection; it takes the old four-pin type. Bought them cheap at an auction, got them home, and plugged each one in. One did make a sound, not the welcoming and familiar chime, something between a squawk and a clunk. The others didn't even do that much.
Now for my question: how do you get inside of these things to see what's going on? I suspect it might be something as simple as a loose wire, a line fuse, or the system battery, or maybe the power supplies (and I have power supplies that I know work), but durned if I can figure out how to get the bloomin' shells open! I've poked, prodded, pulled, pushed, and tugged and finally gave up. Help? TIA!

That is the All-In-One G3, a wonderful system. It uses exactly the same motherboard, sound card and drives as the other beige G3 models, but will never have the Rev A versions because it was introduced later.
The works are in a drawer that slides out the back. There may be as many as four long Phillips screws retaining the drawer. There is a drawer-pull at the very bottom of the panel that has all the I/O cables. and the entire 6 to 8 inch tall panel is part of the drawer.
Once the drawer is fully opened, it can be completely removed for easy service by placing your hands under it as if to lift it up. Your hands will engage the slide releases that will allow it to be removed. There are Four cables that must be disconnected for complete removal: 20-ish pin Main DC Power (which has a hook on the side), 4-pin Drive Power, 10-pin Video from the sound card, and 40-pin front panel & speakers from the sound card.
If you need to get into the CRT area, you will need to remove the bottom front panel cover, which exposes four truly enormous screws hidden next to the speakers. You cannot get inside the top part otherwise -- the entire upper cover comes off as a unit after also removing those two small screws on the top at the front under little plugs.
Some folks refer to this Mac as the "Molar Mac" or simply "The Tooth".
Message was edited by: Grant Bennet-Alder

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P.S. (pre script)
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Hi Guys,
My macbook is driving me insane now. Just recently, my macbook has occasionally flickering screen and freezes after that. Yesterday, when I was watching youtube on fullscreen, it first has flickering screen, then freezes. So I hard booted it pressing the power button. Then, when I try to restart it, it won't boot pass the apple logo no matter what.
Here's my macbook spec
2007 Summer Macbook Pro 15"
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I cracked my screen once, and got a replacement, don't know if that matters.
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Booted in verbose mode but it gives a warning message:
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Boot with installation disk pressing C at startup. Success after a few try:
Opened Disk Utility and did disk repair (no problem found).
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When I try to reinstall Leopard OS X 10.5 with installation disk, the macbook seems to try to read the disk, but won't boot. I've got a CD stuck in the optical drive now.
I've tried everything I can find online short of opening it up and send it into the oven for baking! I pray it's not a hardware problem, coz I'm no good at that. (QAQ~~~) Please help me!
Thank you very, very, very much!!!
ps. this is my first post. please let me know if I have missed anything.

starangelam wrote:
When I try to reinstall Leopard OS X 10.5 with installation disk, the macbook seems to try to read the disk, but won't boot. I've got a CD stuck in the optical drive now.
Reboot the machine holding the trackpad or left wired mouse button down, that shoudl force eject the 10.5 disk.
Reinstalled Snow Leopard OS X 10.6.
This time it booted with Finder and everything for a short while, then the screen flicker and freezes again (before I can backup anything!). Then, I can't reboot pass the apple logo again.
Ok, so your attempting data recovery efforts.
First get the 10.5 disk out of the machine, like above.
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Older Apple G3 'uglee' won't boot

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