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I have one question for 2 x BDM 10 controllers. Point me a direction please.First controller, L1 /L2 not working, but R1/R2 is working. Second controller R1/R2 not working, but L1/L2 is working. All 4 x controller Triggers working perfectly, tested it with working 3rd controller. Flex cables is ok too.When i connected first controller to PC with connected L1/L2 trigger, controller not recognised by PC, but when i disconnected L1/L2 trigger, controller is recognised by PC. Same happened with second controller but with R1/R2 trigger. After inspection under microscope everything seems ok. Problem is on motherboards somewhere or SIE chips fault ?
The PCB could be cracked somewhere, and that one is a 6 layer board. There's no datasheet on the DA9087, but I doubt it will do much on it's own. There are 15 lines between it and the MCU, 6 of which have PU or PD on them, plenty of places for that to get messed up and cause it to not work. The MCU is also a BGA package, and if the board was bent too much or hit just right, who knows how many of those connections could be knackered.
That's a 100k Resistor, it's a PU for the Reset line. That should be installed as it could cause the MCU to not start up with it missing. There is a 1.8v standby voltage the DA9087 makes. Top side of the board, just a bit below the 2 TP spots for the USB lines is the 1.8vsb TP spot.