How to fix the left bumper

i think that your bumper isn't touching the micro button... just take thin cardboard or paper with double sided tape on half of it. put that on the analog stick inside cover. it worked for me. or get spare parts

I had the same issue and I just put a small "mound" of glue on the micro switch. I let it dry and then put the controller back together.

All this did was make the micro switch a little longer so the bumper could reach it.

Look at the front of the control cabinet. In the part where it rests on bumper, there may be attrition. Also the micro-switch may be damaged

There is a gap under the top bumpers that let you take the remote apart. The problem is that when the remote gets thrown or droped that gap will get bigger, the cause is that there is nothing holding that together so when that happens the gap expands and doesnt let you click the top bumper. The button starts to get lose and its hard for you to use it, when the bumper doesnt work or barley works then it makes some gameplay very hard. The fix to this problem is to ether tighten up the screws in the remote or to find a way to sqeeze the gap back to the position that its supose to be in. You can also find somthing to put inside the gap so that your top bumper is set in the right place to hit in the right spot. You can use a piece of paperor a small piece of plastic.

I had a similar problem with the wired controller I use for pc games. I took it apart and, because I'm a lunatic, used my teeth to carefully pull the microbutton closer. The bumper works again, and I'm happy enough, but it's not really something I recommend normal people do.

You might have the "no money fix" sitting right in your closet

https://youtu.be/e0A6p9nSYeE

The bumpers use ordinary push-button switches, which can wear out after 100k presses or so. If it feels like you have to press it harder than normal, and the problem gets worse over time, the metal contacts inside the button may be wearing away.

It is difficult, but possible, to replace the bumper buttons. Fortunately, the button itself is a jellybean part: search for 6x6mm SPST tactile buttons, and pick a 4-pinned one with a similar appearance to the one on the controller board.

The bumper button is attached to a metal bracket with two tiny plastic pegs: slowly pry them apart. Then, you'll need to de-solder the two joints between the button's legs and the reverse side of the board. To access both pins, you'll need to move the plastic trigger assembly aside by un-clipping it from the board near the bumper button and gently but firmly pushing it up and off the pin. Do not attempt to remove the plastic trigger assembly, because it is connected to a potentiometer which is soldered onto the circuit board.

Once you have removed the worn-out bumper button, you can slot in your new one and solder it on. I also used a dab of hot glue to attach the new button to the old one's metal bracket - if you lick your finger you can press the glue into the gap while it's soft, and hot glue can be removed if the controller lasts long enough to need another bumper button.

You need some desoldering tools, but it's doable.

You unscrew it.then take out the spring and clean it.

Next you tale out the (RB) button,clean that piece.

Then you put the spring in first...then put the (RB)button not top of the spring(be sure it shows/pokes out so you can see it.finnaly, screw the pieces back together

How the controller made into 2 pieces,that's why there are screws to hold it in place

---------------

For people w/a wired controller try to screw on the screws on tighter

Or unscrew it and fix that thing that gets on the top of the controller

My button won't push wen I try to put it to throw stuff

It won’t work for the game rb button