Welp, finished up soldering power to the display board, soldered the ground wire from the appropriate ground pad on RVL-PMS to C147 on the display board. Powered the G-Boy on because I was curious and all that happened was a very brief flicker of the backlight on the screen and nothing else. Thought maybe it was because there was no input, went about my merry way soldering the rgb led. As I was moving the G-Boy at one point, I looked and, well, the ground wire was suspended in mid air with the solder blob and most of the pad attached. There was a tiny sliver of metal left where the solder pad was but the cap had nothing left on that side. So, with trying to get creative since I didn't have SMD caps and the original was shot, I de-soldered C118 from Wii mobo remnants. Dumped enough solder to connect the tiny sliver of remaining solder pad to the cap. Checked continuity between one of the screw mount ground pads on the display board and the USB port shield on the USB board and got a beep so ground seems to be continuous between all three boards. Positive side of the cap is continuous with the 5v pad. Powered on the G-Boy, confirmed the LED worked, and got the same backlight flicker from before. So, question is, am I totally hosed and need to either try to properly repair it or buy a new display, or is that brief display backlight flicker expected at this point? Tried plugging in the control board for the display and pressing the power button, it just gives me that brief display flicker, doesn't respond to the other buttons. Getting 5v at the positive side of the cap when it's powered on. Things seeeeeem nominal on the board otherwise, all things considered. Attached a pic and a link to short vid of the backlight flicker. Other tests I could do maybe? Appreciate any guidance!
