No sound from loudspeaker

[JehielPans]

My sony XA F3115 doesn't produce any sound from the loud speaker, but the ear speaker does have sound. Please help me. 

[Qatrium]

@JehielPans

Go to Settings -> About phone -> Diagnostics -> Test -> Loudspeaker, does it pass or fail?

[JehielPans]

I already did the diagnostics and tried safe modes, but it doesn't work 

[Qatrium]

@JehielPans

Then your last resort is performing a software repair using Xperia Companion. This will do a clean installation of the latest firmware and will also wipe your internal memory. Don't forget to backup using Xperia Companion, but preferably without adding apps or settings to the backup.

Follow the steps given in blue links, and keep us updated.

[JehielPans · Accepted solution]

Thank you but it's already fixed, I just did a factory reset back all files up. Few minutes after the reset the sound problem was fixed. 

[CameronT]

I am glad to year you got it fixed @JehielPans 

If you do notice it again it is worth trying the software repair Quester mentioned.