my phone xa ultra doesn't open

[ahmedsasid]

hi
i have problem with my phone , it eas working well but when i made restart to it , it didn't open and show me the word xperia that is appears when open for 30 min and can't respond by opening or closeing or responding to charge ,, ,,,,,,,what is the solution know ??

[Lord_viridis]

Try holding power button + volume up for 10 seconds until you feel 4 vibrations