My Laser worked at first but now a $160 Has gone dead didn’t overdo

My Laser is a 1500mw Blue Zeus Laser and I took care of it exactly like the manual told me to and even went the extra mile and gave it longer breaks then it suggested plus I never left it on longer than 10 seconds. Is my diode completely dead? I cannot unscrew any part except for the battery compartment and would really like to get this fixed can somebody please help me with information on repairing it or even telling me what could be going on.