To everyone who is looking a replacement activator (the small green part), I was able to REPAIR the activator itself. Once you take off the green component (after step #13), you can actually open up the green component. The small metal tab will fall out, so don’t lose it, you will put it back in later. The small black button may also fall out, so don’t lose that either. The problem in my case was that the switch was stuck. I used a small screwdriver to wiggle the little metal piece inside until it snapped back into place. When you depress the internal metal piece, it should make a “clicking” noise, and the metal tab should connect the circuit (red wire to black wire). Once that is working again you can reassemble it carefully and make sure you still hear the clicking noise.

Not sure if this link will work or not but I took a photo https://photos.app.goo.gl/kj5Cdz13cE4yQC...

If you read the label on the component you can find replacement, mine said “donghai kw4-3z-3a”. https://www.ebay.com/itm/392605448299

To everyone who is looking a replacement activator (the small green part), I was able to REPAIR the activator itself. Once you take off the green component (after step #13), you can actually open up the green component. The small metal tab will fall out, so don’t lose it, you will put it back in later. The small black button may also fall out, so don’t lose that either. The problem in my case was that the switch was stuck. I used a small screwdriver to wiggle the little metal piece inside until it snapped back into place. When you depress the internal metal piece, it should make a “clicking” noise, and the metal tab should connect the circuit (red wire to black wire). Once that is working again you can reassemble it carefully and make sure you still hear the clicking noise.

Not sure if this link will work or not but I took a photo https://photos.app.goo.gl/kj5Cdz13cE4yQC...

If you read the label on the component you can find replacement, mine said “donghai kw4-3z-3a”. https://www.ebay.com/itm/392605448299