I've seen troubles when I had the PC set to hibernate. W10 is an odd beast about that so be sure to tell it to power off and not sleep or such. Also, when I change laptop RAM I remove the battery and wall power.
As you were able to get it to work with the old RAM I will still list the install issues in my list to follow.
1. Be sure the machine BIOS is Dell's latest.
2. Be sure Windows has shutdown and not hibernating or sleeping.
3. Try the old simple reset. Remove power and battery, press and hold the power button for 60 seconds, release, insert battery, apply power and test.
4. Have someone check your stick install. Sometimes I find folk don't get the RAM seated.