Black screen, but the phone vibrates and look like its starts

Hi suddenly my Note 3 (Omega) screen turned black, it vibrates when turning on. Evene if I try go to recovery or download mode it wibrates but screen is still black. When trying to turn on the blueled llights turns on

Even if I take out the pen it vibrates, no sound at all.
Will reflashing Baseband and bootloader help, or anyone else have a solution?

Nexus 6 Vibrates when turned on, at the google screen, vs one that doesnt.

I have restored my phone back to stock locked to exchange but one thing is confusing me. The replacement vibrates when the google screen shows up on the boot loader. Is the default and if so how do i restore this even though I have fully restored the phone via manual fastboot with the latest stock images. If this doesn't actually matter please let me know and we can close and lock this thread. Thanks

Desire 620 (not g) boots to logo, vibrates then restarts! Need serious help!!

Hey guys im in need of some serious help. I was just watching anime on my laptop when i decided to check my clash of clans. For some odd reason it kept crashing so i decided to restart it but it just went to the htc logo and restarted so i went to the recovery menu and did a factory reset. It showed a pic of the htc phone with a updating logo in the middle and after it was finished it rebooted and the same thing happened again. I then tried using the recovery option because it was the only choice i had left but that just showed a lack screen for a minute before showing a pic of my phone with a red triangle in the middle. Is my phone broken? I didnt do anything to it!! Please help!!