Screen Issues

Hello,
I have a HP Pavillion tx 1000. About 6 months ago, my wireless disappered so I took it to a computer store and they told that I had to replace the motherboard. I really ddint have $300 to spend on a motherboard so I just got a usb wireless card. About two weeks ago my computer turned white then froze, so i turned it off and turned it back on and the screen stayed black. I turned it off, took out the battery, held down the power button and all that, and it turned back on. It did it again after a week, now it doesnt want to turn on at all. Any suggestions on anything else I can do. I called Hp and they said I have to pay $45 dollars for someone to talk to me. BULL****. HELP!!!