I have a 93 prelude and it dosent start sometimes when I turn the key. I put in a new starter, its better, but still has trouble starting sometimes. my brother is a mechanic and he said it could be the clutch safety switch/button. I looked around the clutch pedal and I did find a little button that gets pressed down when the pedal is up. could this button be the problem? could anything else cause this problem?

Thanks in advance