Left speaker isn't work from it's port but windows 8 & diagnostic said it's okay just Ubuntu got it

I want to know the reason and if I can fix it or must go to Warranty.

Hello Bassem. The test you should run is the audio test in the Pre-boot Assessment  diagnostic utility. The Pre-boot tests are not Windows tests. They reside in the BIOS memory on the motherboard, and will run if the laptop has Windows, Ubuntu, or no operating system at all. "Pre-boot" means that the tests run on the machine before the operating system boots up.

This is a link to my instructions for how to use the tests to find out if the speakers have failed.

There are 2 versions of the Pre-boot tests. Most of the newer Dell laptops have the one called ePSA. That one has a dedicated audio test.The instructions have a picture of the ePSA tests.

Some of the model have the older PSA tests, which do not have an audio test, but the instructions explain how to use the PSA color test to test the audio.

When you run either the ePSA or the PSA test, and follow the instructions in my link, you should hear some tones from both internal speakers. If you do not hear the tones from the left speaker during the test, then contact tech support to have it repaired.

Welcome Jimco , Thank you for your reply , I did it before when mu operation system was Ubuntu and now again as your picture it said all okay as at u , but I didn't hear any sound from left port at me,

and those pictures are example to see the ports that I mean , no any sound from left port , also left out speaker if I connect it the same, the test sound on Ubuntu also said no left sound , but windows 8.1 , the online scan and the ePSA said all good while I can't hear any sound from my left port.

thank u again @jimco

just example not my one my laptop still new and I never opened

regards

Just for info, not always a speaker problem.  I had a system in 2004 with one bad speaker which ended up with a motherboard replacement......

Of course, I would also make sure the balance wasn't set to only the right speaker.

also the page of contacts hasn't any option I tried it before and it was the same

If you cannot contact Dell through the contacts page, consult the documents that came with your laptop to see how to contact tech support in your country.

@jimco yes i 'm sure first said 8 tones had run then I marked the under choose and then run it give test is okay, but I didn't hear any sound from left port

and I have now just WMP at first was also VLC it was just to try it with windows media player, but still no sound from left speaker

I don't know what I should do after that , I think I tried all ways , you can tell me if any other thing I can do

thank you

also the page of contacts hasn't any option I tried it before and it was the same , I can't send the reply with the picture , failed 5 times

@saltgrass : I tried to fix it by normal ways and soft programs but no change

Thank you all.

I remembered I had a system once which would not play sound from one side.  The balance showed centered, but after I moved the balance control, the sound came back ..

@ jimco: thank you I will back to the seller to tell me where I must go or will try again with sites

there are new news will tell about it after my reply to saltgrass

@Saltgrass : thank you I made sure that balance at me are okay

the new that I removed the audio driver Realtek High Definition Audio Codec Driver, and when I used the High Definition Audio Codec Driver and made the test , the left speaker was failed at windows and online , now I will try the bios steep also then will try other option and if no thing I will back to the seller

thank you all

Thank you jimco & Saltgrass , it was need to replace, and with it's warranty teach support have changed it for free, and fixed all errors.

thank you, have a nice day.