Fujitsu Siemens Amilo M 7400 notebook not charging

Question

My Fujitsu Siemens Amilo 7400 does not charge the battery. It works OK on mains power (although easily disconnected), but the battery does not charge and the battery charging indicator is not lit. From other problems posted on your website, I suspect there is a broken connection somewhere in the internal charging system. Do you have any suggestion on how I can locate the problem connection? Any photo or plan?Thanks,Alan Jones