I just finished installing a d92003mw chip on a jdm-040 and realized that the controller has the exact same problem it had before I changed the chip: no usb connection.
After inspecting the board now (newbie mistake), I noticed that (what I believe are) 2 capacitors were purposely shorted with solder. From what I'm starting to understand, they probably did this to force the controller to share the EXT's 5v line to the USB's 5v line.
My question is: did this "trick"
likely kill the wm1801b chip? I think this chip was actually the one handling the usb connection, but that is also part of the question: is that correct? If not, what does this chip do?
Thanks again <3
Photo: I undid the bridge, but this was after I had already tried the new d92003mw chip.