Careful who you blindly follow in your quest for a hack. I was (I gues back handed in a way) trying to compliment our friend here for choosing to take on such a difficult task. And I am trying to be nice still, but when you blow smoke up my ass I will call you out.
1. Not a kid, 22 engaged and have had years and years of experience.
2.
http://www.pictureshack.us/images/72790_allinone.jpg
3. The trace was pulled up because of a clamp I was using from radioshack which is standard to use for flat mount soldering. The clamp was spring loaded and got stuck which removed the trace and the resistor with the pad, the reason I thought I was getting a cold solder joint is the trace had a break further along the line up by the chip, this is not my first rodeo I have been doing this for over 5 years.
4. Last but not least I removed the eMMC chip, an amateur with improper tools could not have done this without breaking the solder joints or burning up the chip, as you can see that is a clean removal.
5. The board is 2 layered, I checked by scratching under the trace and found a ground plate on both sides.
6. I was planning to remove the eMMC anyway to document a full nand replacement, check my first post.
1. You kinda made my point about the "kid" comment. You are young and you let your emotions run your responses.
2. That is great, never questioned your resume'.
3. I have been in electronics manufacturing for 7+yrs -- I am confused about a clamp that is used in flat mount (Surface Mount?) soldering that is a "standard". Gonna call bravo sierra on that. No such animal, or standard anyway. This is just inexperience. Traces are glued to the PWB/PCB, heat is what removes them. overheating burns off the glue and then they lift. For home repair you can use any glue (EPON is what is used in manufacturing) that will hold long enough for you to touch an iron to and reflow as needed. I will get to "cold solder joint" in a second.
4. Removing a BGA in your kitchen (or even reflowing it) can be done if you follow simple steps. Preheat the PWB/PCB @ 100degF for about an hour, this heats up the power planes so they don't wick the heat from trying to remove/reflow bga. Use a hair dryer underneath the board to maintain a constant temp, and use a paint stripper gun to apply heat to the top. You might want to spend 15$ for a IR heat gun @ RatShack, its just a point at an object and get the temperature. Probably safe to go as high as 750degF (for 10-20sec @ a time). Then you would just lift it off with tweezers. Reflowing is different, if someone wanted to know how i can explain..
**preheating is something that makes life so much easier when reworking a board. also prevents cold solder joints. Also use Flux, no clean is ok, but frankly the nasty stuff is much better, and they all clean up with alcohol.
** also don't do more than 100degF, these are class 2 devices, and most of the capacitors can't take over 150degF for periods of time, electrolytics will rupture or expand and fail.
5. The board is 6 layers minimum. NOT 2. My guess from pictures, is that the two outer planes are GND, there is a center layer that is V+ and breaks off into different supply rails. the other layers are there for obfuscation. Same reason they have the 3 chips on the die. Any line that you could put say a bus pirate on is probably buried somewhere and only breaks out under BGAs or other hard to remove components, and if you could do an xray you might be able to find them and do a layer drill to tap them. But this looks more like the usual with Nintendo, it will be a software solution -- and replacing the flash with an SD card would probably not be an easy task because of timing issues.
** 6 layers is pretty much standard for PWB/PCBs that have BGA/FPGAs on board.
6. Full Nand replacement. That is a good idea. I would start with that Nand part number and digikey and compare datasheets of this device and others, then even shoot them an email and tell them you need a drop-in replacement for part #XXXXX and maybe they already know what will work. But that is just what I would do. There are some constructive conversations to be had.
I am not saying this to be an ass, or beat you up. But it sounds like you are capable of giving bad advice, or bad information. Maybe you need to go to school, i was the same way you are when I was first starting out. You can probably learn a lot that will focus the abilities you already have. I am sure this will be seen as just another "flame". Oh well.