Help! Display Won't Change When Keyboard Slides Out

[howdizzle]

I just received a TP2 I bought used on eBay. It was actually in better physical condition than I thought it would be, and I already went ahead and activated it, but now I realize that when I slide the QWERTY out, the screen remains the same! It won't reorient to landscape mode in any application. Only in photo-viewing mode will it rotate when I rotate the phone physically; sliding open the keyboard makes no difference. I tried calibrating the g-sensor; the g-sensor appears to be working normally, at least it works in photo-viewing mode.

The keyboard itself also seems to work; it inputs normally, activates other modes such as text or email when I hit those buttons. But from the home screen, in text mode, in Word -- no rotation! I can't get it into landscape mode. When the screen goes to sleep, sliding it open won't wake it up. This is tragic! The phone is practically useless if I can't get it work properly in these modes. Is it hardware-related, or is there a software fix? If it's hardware, is it something the Sprint store people can fix?

Please help!

additional detail: when closing out of camera mode and holding the unit sideways, the display does flash the next screen in landscape for a tiny split second. Also, when on the web, the screen rotates into landscape mode when i hold the unit sideways, and yet when I try to type inside a field on the web, it won't recognize the qwerty. It does recognize web commands from the qwerty such as "page up" or "page down" when holding the function key, but not text input! Meanwhile, in Word or in SMS, I can type letters from the qwerty just fine, but the screen stays in vertical mode. What the heck's going on here???