Flashcart side-effects

I had my DS lite for a year n a half now and had my R4DS for nearly a year,at the moment i have experienced some side effects from the flashcart(R4DS), I have a broken L button and a broken Microphone and my friend has the exact problem with a different flashcart and i know a few more people with different types of problems. Do the Flashcarts cause this or is or does it depend on the age of the DS.

 

that's a weird glitch, it never happened on my M3 DS Real anyways

I'm using a DS Phat

 

It's not caused by the Flashcart. The shoulder buttons on the DS are notorious for being damaged. The mic is nothing special either.

Flashcarts cannot break your shoulder buttons

 

You've obviously never used a flash cart to pry the L button off your DS

 

I cannot say that I have.

 

and do any of you know the smallest fee I'd have to pay to repear my broken L button and the microphone?

 

A lot more than a small fee most likely.

You can get them for fairly cheap, but paying someone to replace them is what's going to cost you the most.