830 Edge blank screen - it will not come back to life

I purchased my Garmin 830 Edge in April of 2020 and have been keeping up with all of the upgrade.  That said several weeks ago the unit would not power up and us gives me a blank screen not matter how many times I've rebooted it.  I've tried your reset procedures on-line and still nothing.  

How do you suggest I try and bring this back to life?  What is the warranty period on this unit?  

I loved using the 830 and worked perfectly with my bike until it didn't.   Again how do you suggest I bring this back to life?  From time it looks like it wants to boot but then it either goes blank or the screen turns white and that all she wrote.  Need your help as there is allot of fall riding to be done!

Thanks, look forward to your response!!!