I'm just learning about boards. I bought a beat up Stellar Wars that doesn't work, just to see if I can fix it. I've been following Vid's guide (thank you for creating it) and bullet proofing the power board. History- The game turned on and played for a minute when I bought it and now it's stuck in 04 mode. I think I might have crossed a socket wire, but not sure. So maybe the IC19 is out? However, before messing with chips, I want to make sure the power is good. I've replaced the capacitors on the power board, reflowed connections and replaced the 40 pin.
Can anyone tell me what this giant capacitor does (big green one in 4th. pic)? Looks like a portion of the power supply, but I didn't see anything on replacing it. Also, I didn't see it in the schematics. I've included some pictures of the power board, in case anybody can spot something. Also, the power cord that goes into the wall is spliced and looks old with electrical tape. I plan on replacing that.