Please check a few things.
1. Is the Rose device model you are using RS520?
2. Does the power not turn on when I unplug the power cable and connect it again and press the power button?
3. Does the RS520 smell like something burning?
4. If you think the RS520 is overheating, leave it alone for an hour and then turn it on.
5. If the power still does not turn on, I think you will have to contact the distributor in the country where you purchased the RS520 for repair.
eng.hifirose.com/Distributors
my unit just shutdown, I am thinking that it may have overheated.