What is the 2 diy fixes and how do they prevent the issue from reoccurring ?
(1) Remove the four-wire connector (male and female) and solder the wires directly to the board. That's what I did. That eliminates what we think is the primary problem. We think the metal conductors inside the connector are of a poor quality, they don't seat well, and then they corrode, causing increased resistance, which increases heat at that point and the whole thing fries. That's a working theory (mostly mine).
(2) We have a very proficient electronics member that has determined that the two pairs of wires carrying the bulk of the current (two red and two black) are actually connected electrically via the traces on the circuit board. So by physically connecting the pairs together
before they get to the connector (like soldering or even wire-nutting the red to the red and the black to the black), the bulk of the current will take that route, and the voltage required by the circuit board would still reach the board, but not with all that current. I haven't tried that yet, because I got my IpH working with fix #1. I don't think anyone has tried that yet, but... wait, what's that you say? You want to be first? Well that's fantastic!!
Fix #1 requires some heavy duty soldering skills. Which I have, but it's a miracle I didn't ruin my board in the process. I describe how I did it in detail in the post I referred you to.
Fix #2 is relatively easy, and could be done without even soldering, but we haven't actually tried it yet. The guy that claims that'll work is very well respected here, and I trust that he has this right. But while fix #2 is easy, it does have the caveat of being theoretical...
Once we can verify that #2 works (and we are working on that), then I would recommend that mod on day #366 of an IpH installation (the day after the warranty expires). Waiting for the over-current event to happen runs the risk of frying additional component on the board (we've seen that happen), so by being proactive, and performing the wiring mod in advance, one could solve for the problem before it happens. Theoretically!