v3 PAL PS2 + Messiah2Pro boot probs, please help

[Gouki]

Hi!

The situation is as follows;

I got a gap-bios v3 Pal PS2 modded with a Messiah2Pro (not the
1.31 but earlier version). Some backupped games (cd-r + dvd-r)
work like a charm while some refused to boot.

This is not a media issue since the games that refused to boot
(Vice City dvd and Tekken4 rip) won't even work when I copy
them to the media I use! Laser's calibrated ok also.

My own backup of Vice City runs perfectly on this machine though.

The same Messiah2 chip came out of my own PS2 which
had no difficulty booting those same games on the same
media..

Any suggestions as to a solution or what might be causing
this weird problem?

Kind regards, Gouki

[charlie_ps2]

If any backup works correctly, then so does the modchip.

If you had no control over the creation of the backup, then I would suspect the viability of the backup that won't work.

[Gouki]

The M2 works like a charm, have had in in my v7 for
ages, I do not suspect the chip. The backedup games
that won't run on the v3+M2 did run on the v7+M2 and
also that same v3 (no mod) using a swaptrick with Action
Replay.. Is is somehow possible that those games were
patched in any way and that this interferes with the v3+M2
combo?
Could it have something to do with the dvdcontrollerchip
perhaps? Those are the only point which *might* not be
100% soldered correctly..

[charlie_ps2]

I rememebr a trick with the Messiah1 that I didn't try with Messiah2.

With all the Messiah1 points installed except the BIOS points (M-W), you could boot a backup (not an import original) with AR2/GS using the Swap without codes. That might work with Messiah2 (can't guarantee it).

So you could try de-installing the BIOS wires andif the above trick works then there's a BIOS wiring problem.

What I REALLY think it is is the specific interaction of THAT media with THAT laser, which is probably a tired laser.