🔧[BDM-020] R2 Trigger Permanently Activated – Even Without Flex Cable

Hi everyone,

I’m dealing with a PS5 DualSense controller (BDM-020) that has a persistent issue with the R2 trigger input being stuck "on", even when no trigger or flex cable is connected.

Here’s a full breakdown:

• R2 is always registered as pressed, even without the flex cable or trigger module connected.
• When I reconnect the bumper flex cable, R1 works, but R2 remains constantly active.
• The actual R2 trigger module works fine on other controllers.
• I also tested other working trigger modules on this board – same problem: R2 stuck.
• I noticed that the pins of the flex cable seem to bend slightly when inserting the cable inside the FPC connector (trigger flex slot), which might suggest mechanical damage to the connector.

• Mainboard: BDM-020

• Has anyone encountered R2 input being stuck "on" at the board level, even with no flex cable?
• Could this be caused by damage to the FPC connector, e.g. shorted or internally bridged pins?
• Is it possible to replace the trigger FPC connector or clean/fix individual pins?
• Any specific points I should probe with a multimeter to isolate the issue?

I’d love to hear any suggestions – I’d prefer to repair this board if possible instead of scrapping it.

Thanks a lot in advance!