Certain Keys on Keyboard Not Working

I have a Dell Inspiron 11 3000 series 2 in 1 laptop and recently (within the past few days), some of the keys on my keyboard are not working when I start up the laptop. After my laptop has been on for a few minutes, they seem to work fine but they still randomly stop working for a few seconds at a time. For instance, they are working just fine right now. The keys that do this are all close together on the keyboard (which I feel like that has something to do with it) and are listed below. 

p 0 - [ ; '   

I should also point out that the keys are not broken or loose. I'm only guessing that this is a hardware problem and that it can be fixed if I have tools or something, but I'm not a tech wizard, so I don't know for sure.

Any help would be appreciated! Thank you!