12" Powerbook battery won't charge, fan does not work

Thank you so much in advance for answering. I recently acquired a 12" powerbook with a broken hard drive. I replaced the hard drive and everything seemed to work fine, except that the fan was always on and the battery would only partially charge(to about 30%) and then would only trickle charge. The battery has 251 charge cycles and holds 82% of original amperage (at least it is supposed to). However, it only charges to about 30% (or about 1200 mAh) and then will only trickle charge from there. After browsing these forums I now think that I may have a bad logic board or DC in. It occurred to me that the fan issue and he battery issue might be linked, can anyone verify this? I am thinking that if the hard drive was broken, this computer could have been abused, heavily dropped, etc. Is there a way to check my logic board or DC in board? It could also be that I merely need a new battery, and the fan issue is unrelated. Help!

Welcome to Apple Discussions!
For charging issues, a good place to start is to reset the PMU:
http://support.apple.com/kb/HT1431?viewlocale=en_US
Did you get the set of discs that originally came with the powerbook? If so, one of them will contain the Apple Hardware Test, and you can run the extended version of it to check for hardware problems.
The fan always being on might be an indication of processor heavy activity. You can check for this in Activity Monitor (in your Utilities folder in your Applications folder). Be sure to select "All Processes" at the top. Sometimes a process will hang up and hog the CPU, which will make the fan run and is hard on battery life. If the fan is no longer running, are you noticing any particular heat build up?
I think your powerbook was from 2004, and since this is 2009, the original hard drive would be 5 years old, which is probably at the end of its average lifespan of 3-5 years of useful life. A failed hard drive does not necessarily indicate other abuse.
After resetting the PMU and checking activity monitor, I think the next step should be to run the extended version of the Apple Hardware test and see if it tells you anything in the form of an error code.
Good luck!

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