I give the nod to USB headphone/mic systems. It appears you tried and it's not working out. Time for plan B.
Okay, so the microphone on my laptop recently broke on its own free will (joy), and I decided to revert to my old headset I used before I got this laptop. It's a turtle beach x12 headset, which as a USB port, and a headphone/microphone jack. This laptop only has one jack for both headphones and microphones, and even has a symbol for both right above the jack. I have a jack splitter wire thing and when I use that it only picks up the headphones, and doesn't say anything about even recognizing the microphone. How can I get it to pick up the microphone?
I've added visual representations below just in case my explanation was confusing.
^ It doesn't pick up the pink (mic) jack. How can I fix that?
^ The jack I'm splitting.
^ This is the exact laptop I'm using, and I only put this here because I don't exactly know where to find all of my specs.