as said the most common issues this will help, theres loads of other variables but this is the "stage one" of tests,,,,, always do these !!!

i remember once chucking out a tv cause it cut out,,,, took the plug off it as im a pikey fucker,,,,, went to use the plug a few months later,,,, the lamp had no power

the fuse in the plug blew !!!!

always start with the basics