LED lights strip quickly flashes and goes off
2 amps isn’t gonna do it. 
Had same trouble. 
With arrows aligned, got a one time flash, then nothing. 

They were cheap so could be anything. 
Bad battery in remote, crap connectors, broken led wires, thermo failsafe in module( kinda right)....etc.
Most would chocked it up to “you get what you pay for” and tossed them in trash and moved on with a healthy productive life. 

But by then it was personal.
Was lucky enough to have bought 2 of them(10m
rbg), so was able to switch out parts and after lot of google and YouTube, learned that you need about 5-8 amps to make this work.

It was shutting down because of a power problem, but it wasn’t because it was over powered, it was cause I wasn’t giving min required workings amps.

Went from 12v2a to 12/5a and “let there be light”, all parts working.  

Ps
Long span wattage drop is a thing. Don’t try to amp your way through it. Fire is not good indoor mood lighting. 
Take time to research the safe way and don’t die