Phone won't start-up

A

AC Question

Dear all,

I have a Huawei Ascendy Y550. Since a few weeks, booting proved difficult, I sometimes had to press the power button several times.

However since today, the phone doesn't boot, no matter how many times/ how long I press the power button.

So I googled and saw fastboot and clear cache could help. However when I go to fastboot I get very shortly the following message: "Image verify failed! Please update to the authorized image".

Can you please assist?
 

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