well this happend today i was obsulty bumping my system and out of no where my system stopped working like the power botton is on and its green but when i turn it up it turns red on (protect mode) can any body help me resolve this problem please please got a car meet tommorow.
If you were just installing I would say check here and there but if it was working and stopped and stays on protected mode most likely the amp is all done.
You may try to disconnect the speakers and turn on to see if it still goes into protected mode if it does not maybe there is something with the speakers (but unlikely), anyways you should find out what happened to prevent having the same problem later.
Most likely the amp is blown but try connecting one speaker at a time just to see if it happens with one of them only, also check all the wiring on your speakers. Even inside the enclosure if those are subs.
Better would be a multimeter but you don't have one.
if the amp is working at lower volumes, it's not blown. it's either the gain being set too high, the amp is wired at too low of a load, of the car's cahrging system isn't ptoviding enough current. this is assuming it's not a bad ground point and the power and ground wire gauge is sufficient.