Sound on the right side internal speaker is dead

While playing songs, suddenly, sound on the right side internal speaker is dead but another -left side speaker is working, now only one speaker is producing sound. If I check it using headphone, sounds on both sides (left and right side) are coming. Please let me know what the reason it is.

Both channels in headphones are working and it means the laptop sound card is working correctly.

Most likely your problem is related to the right speaker failure. Apparently, the right speaker went bad and has to be replaced.

In order to replace the faulty speaker it’s necessary to disassemble the laptop, remove the top cover, unplug the faulty speaker from the motherboard and replace it with a new one.