Botched Install Advice?
Many months ago, I botched an install (v7 I think) by totally losing one of the traces that go underneath the CD/DVD controller BGA. It was the one for solder point "G" according to the Magic3 v7 diagram.
Is it totally worthless now, or could it be repaired? I'm assuming that the trace connects to the BGA itself. If not, is there an alternate point for that end? Or does that trace to the BGA even need to be connected if a modchip is installed using the alternate point on the chip leg on the other side?
Only other point I know of is a leg on the DSP chip. It's the largest chip on the bottom of the board (bottom meaning the side where the BIOS is)
Thanks. The problem is that I don't know where the trace from the DSP ends up at. It goes underneath the BGA on the other side and I'm guessing that's where it ends. If that's the case, the PS2 is toast as is (no modchip), but I'm wondering if that trace even needs to be connected if a modchip is installed? Does a modchip "replace" whatever function that trace is used for? I hope that makes sense.
If the trace does not end under the BGA, and there is another point on that end, I could just connect a wire from the DSP leg (or the via on the other side) to that point.
OK, First to see if you can use another point you need to do a conductivity test from the pad that you lost (gently scrape the trace just a head of the lost pad to expose copper). And test that trace to the via down the line. The good news I checked and you can use the leg of the DSP chip as an alternative. (I didn't count which one though).
Now here's the tricky part and as always you do this at your own risk. The trace on the other side of the pad STILL needs to connect to complete the circuit. So at this point you must use caution in this type of repair. The best bet for you is to scrape that side of the old pad (gently) and solder 30ga wire from that side of the pad to the via you tested earlier. When you solder to the trace GLUE the wire to board so it can't move. Then after you have completed the circuit you should leave that side of the board for G anyways. And connect to the Leg on the top chip as an alternative.
If you lost the whole trace, then you might be otta luck. This repair is hard and the risk is great but if your up to it , then thats what I'd do
Thanks for the reply, but I must not have explained it well enough. I apologize. The trace from the via to the missing pad is all there and fine. The problem is that the pad, and the rest of the trace (that goes underneath the BGA) is gone. Completely gone. Cannot be reconnected. My question was, is there another point beyond that, or does it end underneath the BGA? If there is, I could just connect that point to the VIA or something. But if there is not, like I suspect, then I'm screwed unless the introduction of a modchip (with that wire connected to the via or the DSP instead) eliminates the need for that trace to be connected... which I also suspect to not be the case.
You?re right it?s probably not the case!
The pad is a "flow through" point, and not just a connection point (unfortunately). If you have access to an industrial dryer (a big hair dryer) you can lift the chip and place a wire directly to the G point.
I did the test on the other side too, and there is a point on the top of the board in a cluster of via's. But if you connect there you skip the chip all together (and I don't think that will work either)