Stuck on bootloop and can't reset because fastboot screen loading forever

[YouthfulPat501]

My phone suddenly turned off and whenever I try to turn it on then it just bootloops. I'm trying to get into the fastboot menu but it just loads forever. Can I do something about this?

 

[Promessa]

For me, always holding the volume button - with Power off. It always worked in this case. I'm not sure if it's the volume + or the -.