Pic fix alone?
Having read through all the threads on this, I'm uncertain if this has been actually determined or not...
Does the pic effectively kill the v12 console BEFORE damage is done to the tracking coil???
Believe me, I positively endorse and love the summ0ne fix... hasn't failed me yet. But I have a customer who dropped off their console along with one of the new M-7 Pro's... and specifically told me not to do the laser fix (he'd read about it from my site), since he believed the M-7 to be sufficient (has the pic fix built-in). Just got me thinking if it's actually enough for the job.
I doubt it personally.
There has been talk about the delay before it detects the mechacon crash and shuts down. I would surmise (I'm not an electrical engineer so this is just conjecture) that with repeated mechacon crashes the laser would essentially degrade over time, if not fail completely after the first couple of crashes.
I think even the Infinity team said their initial PIC fix wasn't enough.
In the matrix pic fix, there's a time delay (200ms?) between when a mechacon crash occurs and the PIC attempts to shut the playstation down. And the shutdown procedure takes extra time... Secondly, there's a 1.5 second timeout when you first turn the playstation on. So if you turn on the playstation and the mechacon crashes right away (which I'd imagine happens with a flaky modchip install) then you can end up with ~2 seconds of coil burn.
It's a much better improvement than realizing "oh wait, my playstation locked up", getting off the couch, yanking out the power cord, and having 10-20 seconds of coil burn happening which can definitely fubar your playstation. But with enough mechacon crashes, your coils might still end up getting burnt up over time.
I'm hoping my own PIC fix improves on this, but it hasn't been tested in any consoles other than my V9 so far, so I can't recommend it for a customer console quite yet.
The summ0ne fix is excellent. I've read about it affecting the ability to read bad/scratched media but considering that a blown playstation can't read *any* media, you can't really complain. I'd push the customer hard to include the summ0ne fix... unless of course, you want to make a few bucks putting a new laser assembly in the guy's console ;)