Wireless button on dv7-1245dx turns off by itself

My wireless button turns itself off and the volume bar appears on the screen and the speakers click. Is there any way for me to bypass the wireless button with a function key? Because no matter how many times I try sometimes it wont turn back on.

Well, I have tried everything that you have indicated, including re-starting the eMac from the Tiger installer DVD and going to the Disc Utility and repairing the disc (nothing wrong) and repairing permissions-- lots needed corrections-- anyway, I still get the issue--- when I try to locate the eMac on the home netwrok, it looks like it hooks up for a second or so then I get a yellow triangle with an explanation mark in it saying the network is interrupted--and when I go into the system preferences the Personal File Sharing button is unchecked--- weird !!!
Ok, here are a couple of other interesting items-- when I go to the Go menu item and scroll down to the Network command, it will open a box for more than a split second the first time-- then not at all after that.
Secondly, when I do try to access the eMac, I do not ever get the little Connect to Server box asking for the short name and password to enter (??)-- also weird.
Any other suggestions--- this eMac was recently totally re-built-- new hard drive, new memory and new logic board-- (Seems I had a serious power surge in my office and it fried everything) -- I even had to re-install my printer and scanner software-- !!! Thanks for any suggestions.

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