The board was corroded, and the on/off button is gone. I got power flowing through the board, but I've never repaired these style buttons before. I have the idea of scraping the solder mask and wiring up magnet wire to the traces/vias. But I'd like some opinions.
I found an old 360 slim laying around, that must have been sitting for the majority of a decade. I needed a faceplate and figured I'd grab it from there. Before grabbing it, I decided to power it on and test it, and I got a red dot. Figuring it was an old trash console I forgot about, I proceeded to take it apart. Once I had the shell mostly off, I saw it had a Coolrunner and NAND-X headers installed. I plugged it in to test the faceplate and ribbon cables again, and to my surprise, it booted into the Dashboard. It was on 14719, with a Coolrunner chip installed, with NAND-X headers still (sloppily) installed on the board. It must have been a console I modded forever ago and couldn't get it to boot with the top case installed, so I gave up. I booted using the eject AND the power button several times, and it never booted to Xell, so I figured it was stock firmware. I dumped the NAND, created Xell for RGH3, removed the Coolrunner, and installed the RGH3 wiring. Now, it was flashing green then either powering off instantly or going to a red dot. I flashed back the "stock" NAND, and I'm getting the same thing. I don't know where to go from here. I stupidly didn't take any detailed before photos because it was disgustingly dirty. The job wasn't terrible (except for sloppy headers), and my soldering skills aren't bad. But now I don't know what to do. I tried a few different resistors for the RGH3 Xell image and none of them worked. I even tried no resistor just for a boot, and same issue. I'm guessing this was an RGH1.2 and it should be converted to stock before doing an RGH3, but I don't have the CPU Key, and Xell wasn't loading with the Coolrunner installed anyway. I'm guessing at this point, I can probably clean up the Coolrunner, reinstall it, and attempt to get it to boot again, but if it wasn't booting into Xell with the eject button, wouldn't it have been a stock NAND and therefore boot without the Coolrunner wiring?
I'm uploading photos, and I'm going to point out places where I see a potential problem...
C3B8 - Tinned pads but possible missing component.
C3B10 - Left pad damaged, possible missing component. The pads here were pretty rough, so I tinned them again to clean them up.
C5R11 - Pads had a lot of tin on them, but no component. I used a braid here to clean them up.
FT4R2 & surrounding area - A lot of stuff was going on here. a Coax wire, a blue wire, and a second blue wire, all in the same area. The pad on FT4R2 is missing, but the via is still barely intact enough to tin it.
So, what do you all suggest from here?