I had a faulty VA5 that was well beyond my capabilities to fix, so I decided to take the plunge and order an AliExpress motherboard and IPS screen kit, among other parts like a new case, etc.
Last night I installed the single ASIC from the old board, along with the cart slot, crystal oscilator, LED, and communication port. After installing all the components swapped from the old board and installing the new components provided with the new board I decided to give it a test run to see if it worked and it only showed static on the screen. I figured I messed up installing the ASIC, so I inspected it under 10x magnification and it was maaaybe a little crooked on one line of pins, so even though I didn't see any bad connections or bridges between pins I decided to remove it completely, clean and re-tin the pads, and re-flowed the chip and this time it's pretty much bang on, but I'm still having the same issue.
Because there are only really 5 original parts from the old Game Gear on this board and I don't have another IPS screen kit to swap out to see if the issue is on the motherboard or on the screen kit, I don't really know where to go from here for troubleshooting.
Has anyone ever used one of these motherboards before and have any insight? I've used the exact same IPS screen kit previously, but it was to install onto a VA1 with a broken screen, so the install process was a bit different this time around as the motherboard and screen kit were plug and play.
I'm really hoping it's something stupid that I forgot and someone will have some insight, because I'm a bit out of my depth on this one.