Startup problems after battery change

My G4 Desktop, now getting on for 6 years old, but working perfectly until recently, needed a battery change on the mainboard as the clock was having problems. However this has led to startup problems: initially, following the startup chord, the computer wouldn't start at all. After some online digging, I found references to the CUDA button/zapping the PRAM. I can now restart by resetting CUDA, but the computer usually won't restart or even start from power off, meaning I have to go back to the CUDA button every time. The computer also fails to recognize the installed RAM, except for 128MB, corresponding to one of three RAM strips.
Apart from the battery, the only other likely contributing factors are that the computer's been shipped internationally recently (however, it was professionally packed and shipped, and made its first restart after this move without problems). The other potential factor is the switch in voltage, from 240 to 110, but that was handled normally by switching over on the back of the case.
I would really appreciate any advice that can help me get this old clunker back in action, and with all RAM recognized. Nice as an upgrade would be, it's not a strong option for me at the moment, and I'm otherwise satisfied with the G4 anyway.
Powermac G4 Desktop Mac OS X (10.4.2)
Powermac G4 Desktop Mac OS X (10.4.2)

Hi, Yukiguni!
You sure have an interesting problem...
You might review Texas Macman's tutorial at the following link:
http://www.geocities.com/texas_macman/pram.html
I'd check that replacement battery with a voltmeter to insure that it's good. ("New" isn't necessarily synonymous with "fresh".)
You might try completely de-energizing your Mac. In the link above, there's a Tip just above the Battery section that refers to what to do when sometimes computers lose their mind. This procedure oftentimes works to reset a PMU/CUDA that seems to refuse to reset properly and retain the correct startup parameters.
If you can get the Mac to boot from disk again, you might run the Apple Hardware Disk. Definitely run Repair Disk from the install disk if you haven't already done so and can get it to boot from disk. (You might try booting to the Startup Manager by holding down the option key at startup and trying to select the disk from there. Your best bet for success is to do so just after resetting the CUDA/PMU.)
Gary

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