Yamaha RX-V375 Remote Control

Before throwing it away and buying another one, try cleaning it on the inside.

Open the battery compartment. Remove the batteries. You will see a screw. ATTENTION: Do not confuse it with the bottom part. It is not a second screw.

Next, be very patient while you pry open the device. The credit card method did not work for me. I also did not succeed with the usual plastic tools for opening an iPhone. Nearly desperate, I used a sharp metal screwdriver, with caution.

As I ran it through the seam, I wondered if the gunk I was removing was contact adhesive. No! The controller is press-fitted and it is strong.

You should keep in mind that the red protective window for the IR emitter will stay hooked into the bottom casing if you avoid breaking it.

After prying it open, I noticed I had caused some slight damage in the form of burrs that caused a loss of smoothness to the touch. I used a nail file to sand the burrs and it ended up smooth.

The parts separate easily. Between the two halves are two rubber mats with the keys and the PCB.

Note that the red protective window for the IR emitter stays in the lower case.

I cleaned the housings and key mats with a nail brush and a little bit of warm water with neutral soap. I dried them with a hair dryer.

I cleaned the PCB with a cotton swab dampened with rubbing alcohol. THIS WAS THE FAULT, AS REMOVING THE DIRT FIXED THE PROBLEM. You can see it on the cotton swab.

Once again, be patient so you don't break it. I used the reverse order, placing the inverted top case at the bottom and putting the other parts on top in order:

Carefully seat the rubber mats, ensuring with your fingers that all keys pass through the holes in the top case.

Then, place the board carefully, noting that the IR emitter remains in its housing.

Finally, place the bottom case, being careful to correctly seat the battery connection springs.

I chose to start tightening from the IR emitter end and finish at the battery end. Remember to put the screw back in. And that's it!