HP nx6325 wont start?

Hi,
I have a HP Laptop nx6325. about 3 months ago i shabby the lead butthe laptop continued to work element typical. now i cannot start the laptop at all with or with out the lead in or with the battery unpluges (The mobile is dead) Every that happens is that the battery light flashes.
I thence study that this was obviosly the power metal, so i took it to a PERSONAL COMPUTER store and they proven a rising