
I went through this with my daily smoothie blender and it drove me nuts. First I confirmed the outlet and power strip were good, then I unplugged the blender and let it sit for 30 minutes in case the thermal protector had tripped. Reseating the jar and lid until they clicked turned out to be key because the safety interlock was sticking from dried smoothie. I flipped the base over and removed the screws, gently cleaned around the little lid or jar switch and the control knob contacts with isopropyl alcohol, then pressed the tiny reset on the bottom and it came back to life. One more quick check was to spin the blade by hand with a towel to make sure nothing was jammed. If you do not get any lights or hum after that and the cord tests good with a cheap multimeter, the internal fuse or motor is likely done and not worth chasing.
When mine finally died for good I replaced it with Hamilton Beach Blender and it has been reliable for daily smoothies. The 700 watt motor has been plenty and the glass jar feels sturdy. The pour spout drips a touch if I rush, but for the price it has held up well.