Game don't boot? Messiah2 pro, v4 ps2

[Serpent]

Well, today, i put in a backup of timesplitters2. The ps2 went to the "browse, system configuration" screen. Did this repeatedly.

So i pull out the timesplitters 2 dvd, put in another game, it worked.

I know for a fact the laser on this ps2 isn't top-notch. But the media is same for both timesplitters 2 (TDK dvd-R). I might have burnt timsplitters at 1x while the other game was burnt at 2x using Primo Dvd.

You guys think this is a media issue? The way I burnt it? Mod chip installation?

Oh: also, I put in 2 CD-R games and it froze at the "Playstation 2" screen that comes up when the game first boots up.

This ps2 also had problems with TDK DVD-R 1x burnt Vice City: freezing, getting in-game message "GTA:VC failed to read DVD".