I am also having the same issue. Unfortunately Dell is being unhelpful. After sending the unit once, then having a touchpad replace onsite the problem persists. Now they say they need replacement parts that will take 3-4 months to arrive. 

I guess they're gaining time in order to expire the warranty. 

There is a DIY fix for it, but it will break your warranty. See this post for details https://www.dell.com/community/Inspiron/Running-List-of-Inspiron-7610-Touchpad-Issue-Posts/td-p/8053835

The Touchpad problem is caused by improper grounding from the touchpad to the frame. Short-term things you can do, apparently putting your palm on the touchpad and touching something nearby that's metal will relieve the static charge for a time, also just closing the lid and opening seems to help. I know how infuriating this whole situation is!

When you talk to the technicians, do try to stress that you need your laptop, they tried to pull the same thing with me and asked me to ship my laptop there, but I told them I needed mine for work, so they scheduled a tech to come out. When there were part delays, they actually replaced my whole laptop with a refurb, but the problem showed up on the refurb!

When the tech comes out, make sure he or she is using an upgraded touchpad part that solves the grounding issue. Since May or June, they've been saying they have this new part that does just that.

After months of dealing with Dell tech support, and they finally admitted they couldn't fix it (this was back in April), they actually offered me a full refund, but I passed it up and tried the DIY fix above, and soldered a ground wire from the touchpad to the frame as pictured in that post. It's been 4 months and my touchpad has worked flawlessly ever since. Others have tried using aluminum and copper tape (no soldering required) and have had similar results. Good luck, it really is a fantastic laptop once you get this fix. If Dell is unwilling to cooperate, I would suggest either a DIY option, or requesting a full refund. ASUS and MSI sell similarly spec'd laptops for close to the same price.

Good luck, sir!

Thanks for sharing. I have seen this fix, and am confident in doing it myself but would really like it if I could avoid voiding the warranty. Dell confirmed it would void the warranty. They just keep replacing the same parts and not fixing the issue. Ultimately, I need a working laptop.

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Get yourself a USB mouse, be patient, and just keep bugging them. If you have an open ticket, warranty services won't expire even if the warranty does. From what I've heard, around a third of all units are affected. There's a metal phlange on the touchpad frame that's supposed to connect with the touchpad to ground it, but it doesn't make proper contact with it because of this spongey material in between (not sure why it's even there). Mine took 45 days to have this problem, it probably took that long for the phlange to stop making contact with the copper contact on the touchpad. I'm betting it's just a matter of time before every Inspiron 7610 is affected. What a headache for Dell Tech Support!

I have been living with this problem for over a year and there is absolutely no way Dell can solve this problem. To be exact, after much testing of my laptop under the guidance of customer service, I had the touchpad replaced, but the new one worked for a little more than two weeks. I contacted customer service again and was offered... oh yes, to test and test again. But I tactfully declined this nonsense, as Dell makes exceptionally low quality products and any other part would be just as low quality. It was my first and last laptop from Dell and I dissuade all my friends from buying Dell equipment.

I have had this problem for over two years now. Saved up for years to buy a brand new laptop only for it to be faulty straight out of the box. Both Curry's (who I bought the laptop from) and Dell refused to accept this was a genuine problem whilst I was still within my warranty. After many emails, phone calls and a huge waste of time Dell finally accepted to have a look. The fix they implemented stopped working after 2 weeks. Again they said there was nothing wrong with the laptop. 

So relieved to find instructions from JackNis posted on 4/4/22. Also fantastic Youtube video below from DashRendar which does a walk through. Ridiculous that Dell now know there is a problem and still refuse to fix. I am not a computer expert and have never opened the back of a laptop, but it seems this is the only way to get the laptop I paid for. I have always bought Dell products but I will never buy Dell again, shocked at the poor customer service. 

Grounding Wire Fix for Erratic Touchpad Issue (Dell Inspiron 16 Plus) - YouTube