PS1 9000 Model Only Boots Backups if Disc Tray Is Open

I have a modded a PS1 9000 model with a Mayumi V4 but this particular system only boots games when the disc tray is open. Anybody know what causes that? I know I screwed up somewhere along the way, though I should consider finding a way to shut the sensor.
The chip I used wasn't Bad_Ad84's btw, but a different and bigger one.

 

remove chip and try again to see if the chips causing it

 

Well, the chip has a connection to the lid switch. It sounds almost like you have that point wired to the wrong point, so when its open it thinks its shut.

 

Anybody know what point it is? Will have to check later though.

 

Leg 4 is (typically) the drive door latch signal.

 

I forgot to clarify. The game boots when the tray is open, but reads as normal if I shut the lid.