Power adapter flashing

Hi
I have a problem with my PowerBook G4. I have it for 4 years now, but this problem came out a month ago.
The power adapter usually lights green when the battery is full or orange when it's charging. And mine is flashing dark orange. And i cannot turn on the computer. I took it to the local agent and they said they have to replace the board sound/dc-in.
After they replaced board sound with a new one i took my computer back home. It was working fine for a while. That is untill I shuted it down. Then same problem again. They have to order new board sound again and replace it.
Now i have removed the battery and didn't use my PB for few days and it's working just fine.
Do you think it could be related to the batteries they are recalling?? Coz my battery did qualify for the battery exchange program both times.
any idea what could be wrong. Can't be the board sound or can it?
PowerBook G4   Mac OS X (10.3.9)  
PowerBook G4   Mac OS X (10.3.9)  

I've got something like this happening.
I'm starting to have a problem with my adaptor blinking between green and orange on my Powerbook G4 15". It also is making a slight beep with the battery in. The battery is lighting up with the 5th light blinking at the same time. I have to remove my battery to boot up or else the hard drive spins up and nothing else happens.
I reset power manager twice, reset PRAM, reset firmware, fixed file permissions, ran Techtools etc.
This started because I was using an iBook power adapter. But I've used that for some time. It doesn't work completely without the battery but works fine with the adapter for the Powerbook.
I'm assuming this is the battery or a more difficult type of reset that needs to be performed.

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