new here have some trouble to my ipad. Please help why all my games apps don't have sound.

Hi and welcome to the Forum!

You haven't inadvertently turned on the mute button have you, it's the little switch just above the sound control.
Also look at the control which is found when you bring up your multi task bar. Do the 4 finger swipe up or double press the home button and you will see your multi task bar along the bottom, swipe right as far as you can go and you will see a volume control slide here. Also another place in Settings - General - Sounds. Let us know how you go.

The IPad Forum is a community of members from all walks of life and from all over the world coming together to share our experiences and to help each other learn about this wonderful piece of technology the Ipad. There is a wealth of information already here in the many threads we have so doing some searches will answer most of the questions you have. If then you cannot find the answer you are seeking then by all means post your question. There are many friendly and informed members here only too willing to help you.

We also have our own App - It is a very simple app to navigate.
http://itunes.apple.com/us/app/discu...412896524?mt=8
Reading the IPad manual is a great place to start so please download a copy of these.
http://www.support.apple.com/manuals/ipad/
2 very informative threads from which you will learn many tips and shortcuts for the IPad.
http://www.ipadforums.net/ipad-gener...dont-know.html
iOS5 Tips and Tricks
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Once again we welcome you here and are so pleased you have joined us!

Welcome to the forum!

I hope you get your issue resolved!