Why has my device stopped working/not charging

My SRS-XB10 has just stopped working. I believe it has ceased to charge up although accepts charger at port so don/t think it is that. It took quite hard knock when I dropped it not long before it stopped working. - would this affect it? If it was a matter of getting a new battery I am sure I could fix it if I had the manual and source for battery. I have worked out how to get into it but don’t know where to go from there. Can anyone help?