PS2 Laser Problems

[Ultimadragon]

I purchased a new ps2 only about 3 months ago but recentely after play FFX i have noticed that the game occasionally pauses in random places at random times. I was just wondering if this is the game acting up or if the ps2 lasers dying out already, i've tried other games, but they do not pause. I haven't had a modchip installed yet but i'm playing to get either the messiah or the magic 2 after i have saved up enough money.

Thanks for your help guys!!!