M2 minimum install?

[CalmBSK]

Current situation -
Ordered 5 M2's.
Recieved 5 PAL M2's v1.07 - All 5 had the via on the pcb drilled out & 2 of the 5 had the track cut aswell.

1) Fitted 1st (track cut, via drilled) in PAL v7 - worked perfectly

2) Attempted to fit 1 (via drilled) into a PAL v5 - all 24 wires connected yet only originals worked. Checked all connections for continuity and dry joints and retried - again only originals work.
Tried cutting the track on the pcb and retried - again only originals work. Tried swapping the M2 for another 2 M2's - both times only originals worked. Removed all wires except ground, clock, scex, reset and 3.45v to see if I could get PS1 to work - again no luck, I do not have an original PS1 game however so was unable to test if they still worked.

3) Attempted to fit 1 (via drilled & track cut) into a PAL v7 - only attempted the ground, clock, scex, reset and 3.45v again to see if I could get PS1 to work - again no luck

I would be happier if there was a problem with the PS2's when I turned them on as this would give me a better idea as to what the problem is.

I have gone through Charlie_PS2's great turorials but have so far had no luck with his suggestions. The only thing I have not tried is to add the extra diode, but as I have PAL M2's and the tutorial states PRO's, I assume this is not an issue.

Can someone please confirm, as I have been unable to find this info, that it is possible to only connect the ground, clock, scex, reset and 3.45v within a PS2 on an M2 to get PS1 backups to work? Or am I missing something?

At least that would tell me I don't have 4 out of 5 faulty M2's, and it's just my installations that have been the problem.

Thanks for any help that is offered.

[meyousikmann]

I think charlie will probably give you a more "definitive" answer, but I do believe I read in one of his posts somewhere that the old idea of only the SCEX wire for PS1 games does not work with the Messiah2.

[CalmBSK]

meyousikmann, thanks for the reply. In some ways I hope you are right as this would mean that my 4 M2's may still work.

I'll try and find his post that you mention, but if not, if Charlie_PS2 gets the time, he can hopefully confirm this either way.

[Prelude]

try alt-clk, and alt-3.45v , another gnd point, maybe no power is going through the m2

[Don6323]

The M2 does not work with the 5 wire test as the old magics did you have to completely install it to be sure it works. On your v5 that did not work ck to make sure it is not a v6 which I'm not sure if their are any pal v6s but if your revision is 1.07 the chip will not work on v6 you need new 1.08 or current 1.21 so try the chip that didn't work on a v7.

[charlie_ps2]

CalmBSK

The 5 wire trick won't work with Messiah 2. So best bet is that there was something wrong with the install. I wouldn't try any alternate 3.45v point as it's not a guaranteed stable point.

The PAL v6 is fine with v1.07. It was only US v6 that wasn't recognised in v1.08.

[CalmBSK]

Thanks alot for all the advice guys.

I'm pretty sure now that it must have been a faulty install, and hopefully not the chips, so am going to rip it all out an start again.

thanks again.