Xperia x8 problem

[PTina81]

Hello,

First off all, my english is terrible. 2 days ago i came from work (at night) and my phone was ok, still with battery on, but the next day morning, my phone was off. So, put it on charge, but the led didn't turn on! I tried again and a i wait, but..nothing, my phone was dead. i tried my husband's phone battery (also speria x8) but the problem persists!!! I 

What should i do??

Thank you

[Uliwooly]

try this 

remove the battery > press and hold power for about 5 seconds > use the battery that you know work for sure > let it charge for an hour or so > try again