Replaced Hard Drive Not Recognized/Boot--Bizarre!

Help.
I swapped a failing 30gb drive out of my 12" G4 1.33GHz Powerbook and replaced it with an 80gb WesternDigital. The Powerbook refuses to recognize it. I've been around and around the boards looking for answers:
* Everytime I start I get a blinking folder;
* I tried to hit option to select the drive to boot, but nothing shows up;
* I reset the PRAM;
* I booted from DVD (says no drive there);
* Using System profiler on the disc, the drive is listed;
* I checked in Open Firmware which SAYS there's a drive there--
using "devalias hd" I get "/pci@f4000000/ata-6@d/disk@0" which I've seen as "normal"
Most bizarre of all--on one of the many starts from the DVD, the Powerbook actually booted from the drive (which I had formatted by cloning my iMac's drive using Carbon Copy !! Everything worked fine for about three minutes then I got a blue screen with a ticking wheel thingie. On trying to reboot...nothing.
Any ideas?
Seems like something in the firmware isn't pushing it to boot, but I've tried to reset everything.
Help!
Powerbook G4 12" Mac OS X (10.4.8)

When booting from the DVD, have you tried using Disk Utility to run any tests on it? Or perhaps even reformat it?

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Hi @jasmine00
Welcome to the HP Support Forums.
I certainly understand your issue with the drive upgrade. Unfortunately it is a bit of the nature of notebooks, the sacrifice of a large amount of upgradeability, in exchange for compactness and portability. Whenever a new technology comes out, older notebooks are never really going to be easy to upgrade, it at all. Normally the unit as a whole is tested with a set list of hardware, and only those items are supported.
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Preparing Advanced Format hard drives for Microsoft Windows installations on HP Business Notebook PC...
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HP Pavilion dv6000 Notebook PC Maintenance and Service Guide
Malygris1
I work on behalf of HP
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When troubleshooting, I always change one variable at a time. I would hate to miss a solution by being in a hurry. In this case, you may have damaged either the RAM or the RAM slot. I would stick with the Toshiba specifications for the RAM, making sure it is the correct size, speed and type recommended. I also recommend that when you replace the RAM that both modules be from the same manufacturer, size, and specification. Try one RAM module in one slot and then the other. And then try both RAM modules in both slots. After the testing you should be able to figure if this is a RAM problem or a RAM slot problem.
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