If I change the logic board, will I lose my data?
My iPod will only power on when I use the monster adapter and play it through my car radio. When I plug it into my computer, it isn't reconized and/or won't power on. Ditto when I plug it into the wall adapter.
I'm thinking it could be your battery that is bad. You can find the replacement here:
The reason it works in your car and not anywhere is could be that the car charger pumps a little bit more juice into the iPod than the computer or wall outlets do, which is just enough to get it up and running. I don't KNOW that this is the actual problem, but it would be a good starting point. if that doesn't work then you will most likely have to change the logic board. By the way, if you change the logic board, sometimes you will have to "restore" the new logic board in which case you will lose the data, but sometimes you don't have to restore. I know that doesn't really give you a definitive answer, but just be aware that that is the case :)
Generally speaking you do not lose much or anything from your iPod if you have to replace a logic board. The main reason for this is that generally everything is backed up on your computer, and after replacing parts on the iPod, you restore and everything is back as it was.
If you got something directly on the iPod and had not synced it with the computer, then that might be lost. Other than that you are at low risk if you have synced it.
I only added this to more directly answer the title question.