Phone stopped working, Cant turn it on, Solid red light, weird r/g/b/w stripes
The key combination you want is volume up and power. However, there's a few things to know:


do this while the phone is 100% off. If you're not sure, press and hold the power button. Some phones (like my Galaxy S4) enter a weird state once they are disconnected after getting charged while off.
do this while the phone is NOT plugged in
hold the volume up key first, and while holding it (half a second is enough), don't let go of it, just start pressing and holding the power button while still holding the volume up button. The order is important. Yes, you are holding both buttons together, but volume up needs to be pressed FIRST, otherwise the phone will only do the power button thing.