Have you find any solution yet? Im having the same problem here and i dont know what to do, its kind of exhausting having an external keyboard for portable device thats its not working as its suppose to.
I've serviced two laptops for clients with flakey keys - either do not work or intermittent. Replacing the keyboard on both of them fixed the problems. One was an Acer and the other a Lenovo. I haven't looked at what is involved on this Dell model to replace the keyboard but on the Acer it was a major task, the Lenovo not as much.
Dell forum member since 2002
Dell Inspiron 15 - 5577 Laptop
Home Built Desktop PC with ASUS ROG Z170, i7 6700K CPU
Windows 10 64 bit Pro and Windows 10 Insider Program Beta Versions. SSD drives. Cakewalk by BandLab and Studio One 4.1 Recordng Studio Software.
Dell S2719dgf Monitor
Member of Nashville based R.O.P.E.
I'm also experiencing the same issue since past 2 weeks. My laptop is same spec (i7-7700HQ, RAM 16GB, 1060 Max-Q with 6GB VRAM). Any updates? I've tried many ways and this is so annoying man.