Xbox about to explode?

[Matt KB]

I have a modded Pal Xbox but I run it with a NTSC EEPROM so I can play US games.

Of the last few months it has been sounding absolutely bloody awful. But it's some games and not others.

MX V ATV Unleashed makes a huge racket after a short time of play. Halo 2 is load from the get go, I can't even play the game because the BRRRRing is so damn loud. Yet Fight Night 2, Forza, Splinter Cell 3 (Pal, region free), Rallisport 2 (same), DoA Ultimate and Ninja Gaiden are absolutely fine and only emit the quiet whirr of the disc.

Is my Xbox going to explode or something? Has anyone else experience this awful bastard noise?

[Salsa Party Animal]

Could the laser be going or dodgy disc.

Try borrowing another disc of the same game

[Matt KB]

Now this is interesting. I tried a Pal Halo 2, and that worked absolutely fine, nice and quiet (it's region free, I left the EEPROM alone).

I then tried NTSC Halo 2, and it sounded like it was going to blow up again. Then NTSC MX V ATV Unleashed, and another explosion noise. But then NTSC PGR2 is quiet again, so is Fight Night 2.

Wth is going on

[Matt KB]

Dammit it makes a huge noise on NTSC ESPN NHL 2K5 but not on NFL 2K5.