Huawei phone won't turn on after firmware upgrade

[svista]

My phone was stuck in fastboot and rescue mode. I try to update firmware. when I do this my phone turn off black screen and won´t turn on. I have Huawei Ascend G620S - L01

Anyone have this problem before? I have no idea how to fix it?

 

[Steven58]

Have you made sure you have enough battery life?