I have SCPH50008 (v9) and MI, which was installed on PStwo previously. Well, I wrote about it sometime ago... My friend soldered MI to USB 5v instead of 3.3v and everyone guesses that it was probably fried. Well, PStwo doesn't bootup anymore, so I can't tell for sure is matrix dead or not.
Then I bought v9 premodded with M-chip 3. It needs about an 25 wires for work and all of them are just in right places for MI (needed for MI, of course, others can be removed). "Well, why not?" I thought and replaced M-chip with MI, cause it's not too hard to solder wires to MI pcb.
After that I powered on PS2 and nothing happens as if MI was disabled or not installed. Sony boots up and plays audio CDs and video DVDs. Only original I have is Xenosaga I (DVD9) and it cannot be loaded, well, it never couldn't... All wires are fine, still i have some doubts (well, I always have doubts in everything ) And I can't enter MI settings.
Coils are just as new (4.5 and 5 Ohms), LA is not dead. Maybe it's wires, or may be MI is dead...
Is there any ways to check is MI dead or not? Something like checking resistance between LA legs (for dead-or-not-LA, of course).