Powerbook G4 1.67GHz 15 inch HR DC board failure?

Hi,
I am unsure if anyone experience the same thing and I am hoping someone can confirm my conclusion on replacing my DC board.
My powerbook failed on Saturday morning when it was left running overnight for some work. When I woke up in the morning, it freezed with a blank black screen. All I could hear was the fan as if it's overheating. The plug indicator light was amber meant charging although my battery was full. The plug or the left speak also released a small 'beep' nose every 2 seconds.
I forced shut down by holding the power button and it couldn't reboot after. I tried many method without success and finally took the battery out, reset PMU, deleting pref... etc, the computer restarted fine but only without the battery connected.
I tried putting the battery back whilst 'ON' and as soon as I connected the battery back to the computer, the computer crashed with the same symptom (spinning fan and black screen).
It's now running from AC without the battery. I also ran the Apple Hardware Test and it indicated the Logic board and everything else is fine, though it never mentioned the DC board. However, it didn't recognise the battery.
I have tried two battery, one have a count of 280 and the other one was newly purchased geniune Apple and have count of 20.
Please advise if some one can confirm the DC board before I order the part and get my hands dirty.
Thanks
Jim

Unfortunately no. I have sort of given up after spending £65 or $120 US to buy the DC board. It took me about 45 minutes to change the DC board... sweating like mad and after all the effort, still the same. I now suspect it's something to do with the Logic board which is no point in fixing as it may cost me as much as the PB to buy on Ebay these days. So I guess I am selling my PB on eBay as parts to get some of my cash back I love my PB and really thought it was the DC board.
Sorry I can't be more helpful but I have tried many things without success.
BTW I am now a proud owner of the new MacBook Pro.

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Logic board issues are not frequent, but they do happen. Somethings you can do to prevent them I've listed on this User Tip:
http://discussions.apple.com/click.jspa?searchID=-1&messageID=607445
While it was written to address iBooks, many of the items apply to Powerbooks too. In addition many people find Powerbooks don't get their fans going off as frequently, if they let air circulate underneath. A clean dry metal cookie tray is a good way to do this. There are also many accessories you can buy to either cool by fan ventilation or just simple raising the computer on a podium. I had an iCurve though, and its rubber pads wore away. So I'd get something else if you decide to get something.

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Powerbook G4 1.67GHz 15 inch HR DC board failure?

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