ibook g4 not charging after DC inboard change

Hello

My ibook began to stop charging a few weeks back, at first I thought it was the battery, so brought a new one, this was fully charged when recieved and the ibook came to life, worked fine, but upon discharge I couldn't charge it back up.

Tested with the power cord alone, didn't switch on, which it should as I have done so in the past, brought a new charger, still nothing, didn't charge the new battery. The light of the charger comes on as green when the battery is in and orange when battery is out.

Changed DC inboard, same issue, charger green when battery is in orange when out and not switching on.

Could it be the battery connector? I don't think its logic board as the computer functioned with the fully charged battery or am I wrong?

Any pointers would be helpful

Thanks