Sound is off Help!!!!

Hi,
I have a HP Pavilion dvd4-2145dx entertainment notebook. I was fooling around with the microphone settings in my control/sound panel, and now i have no sound from my speakers. I think I've changed a setting that has to do with adding a headphone/earphone by usb hook up I was trying to use. I also have a headphone hookup for the front with the regular pronged microphone. I thought I was setting my computer up to accept both, but I messed something up and I can't figure out which setting I used and need to go back to correct it. I admittedly did this once before and did a recovery, but I found out afterwards that wasn't necessary. So I'm at a loss as to how to correct it now. Can anyone help me with this? Thank you so much!!!!!!

Hi;
You didn't provide info on what operating system you are using, but the simplest thing to do to get your sound working before you tried changing the settings is to run the System Restore utility found in Windows XP, Vista, and Windows 7.
You should select a restore point date which is before, but closest to the time your computer was running normally before you changed the sound settings.
This is not a system recovery, it will bring your PC back to the point where the audio was working correctly.
How to use System restore is below: Also see the frequently asked questions on the right side of the web page for more info.
http://windows.microsoft.com/en-US/windows-vista/What-is-System-Restore
Paul

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No sound form :
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Go to Settings > General > Reset and tap Reset All Settings.
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https://support.apple.com/kb/TS3406
Toggle airplane mode: Tap Settings > Enable Airplane Mode, wait five seconds, then turn off airplane mode.
Check your phone settings:
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Check for any blocked phone numbers: Tap Settings > Phone > Blocked.
See if Call Forwarding is turned on: Tap Settings > Phone > Call Forwarding.
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Check for a carrier settings update.
Check for an iOS software update.
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If the iPhone has a SIM card, reseat the SIM card.
If the iPhone 4 or iPhone 4s is on the Verizon network, dial *228 from the iPhone and select option 2 to update the Preferred Roaming List (PRL). The PRL determines the cellular towers the phone uses for cellular service, selecting those with the best signal strength.
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Restore the phone as new.
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Hi everyone
I have a very urgent problem which makes me lose my hair...
We have 190 minutes of 1920x1080 25p footage which we edited in Premiere Pro.
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I'm in complete agreement with Jeff here as well - selling PAL discs in the US will sooner or later cause problems.
Priobably sooner.
In the old days you would not get the player to even load them - it would throw a "no disc" or another error of some description - and even when you did find the odd rare one that would load them, the TV systems would make sure you got a garbled image, or a B&W one. These days a good Universal Player will usually load all types (although again a regular DVD player will most likey still not go for it) but you will still have TV system issues.
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