I have this model and it worked fine for 6 years. Then one day, it wouldn't turn on. I pushed the button, saw a brief vibration, and then nothing. I thought it was busted and was about to buy another when I checked this guide and removed the blade as in step 2. Turns out it was just clogged with 6 years of stray beard hairs 🤦🏼 Thanks for the guide, I didn't realize that I should be cleaning UNDER the blade every once in a while. Now I know!