bello23 0 Newbie Poster

Hi, I'm a complete dunce when it comes to computers so I need some serious help?
A friend of mine gave me a PowerBook G4, she said that it had some problems but nothing like this!
I bought a new Power Pack for it because it wasn't working, but it still won't turn on!
I have tried to reset it and that hasn't worked.
I tried Command-Option-P-R and Command-Option-O-F and that hasn't done anything either.
I also tried taking the battery out and the AC and leaving it for 10 minutes and then holding down the Power button but that didn't work.
I am completely out of ideas and knowledge.
I know nothing about computers least of all Mac but any advice would be much appreciated.
Please Help!

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