GAAAHHHH SX Port?

[Frito]

I've never had so much trouble with a PS2 before in my life. So I get the laser all tuned up, reads like an f'ing champ, no skips, pauses, or anything, even on the cheap media! But it refuses to play PSX Backups. Plays original PS1 games without a hitch.

I've re-soldered the SX connection at least 4 times and this still isn't working for me. Possible defective chip? When I put in a backup it just keeps saying "Please wait" in the boot manager, it never can figure out what kind of disc it is.

Crystal Chip in a v9, running 1.5v2 firmware.

I've put so much work into this Ps2 I just want to stab myself in the face.