Laptop won't recognize that two of my 5 speakers

Original title: Speaker Setup

I have a 5 speaker installed on my HP laptop, but my laptop will only recognize the 2 rear speakers. I changed the speakers that cannot be recognized by the computer with those that are exactly the same model and it still does not work. I can't understand why this is happening, anyone have the same problem that could help?

Hello

1. don't you make changes on the computer before the show?
2. have you tried to connect a different enclosure on the computer?
3. are you able to hear the Windows startup sound?
4. you receive an error message?
5. what version of operating system you are using on the computer?


Method 1:
You can try to plug the speakers on another computer and check if it is working and also check if the speakers are connected correctly to Jack on the computer.


Method 2:
You can check the link below and check if it solves the problem.
http://Windows.Microsoft.com/en-us/Windows/help/no-sound-in-Windows

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