Got Modbo v11 with 1.38 firmware on my ps2 slim (7000x) and decided to update it because it was very buggy and every time tried to change something in mod chip menu but was left with not working chip at all(after putting it in standby chip started working but didn't save settings>:[ ) ...
I got opl on my ps2 slim(7000x), it boot up only if I:
1.Boot up console and select OPL
2.Wait ~10 sec and then reset console
3.Again select OPL
And only then OPL boot up, It's basicly with every program in FMCB.
For example, LaunchELF does the same thing!
In FMCB settings I set all 3 opl path's...