Toldi

Hi Everyone I am new here.I just purchased a f900bt. It has some boot up problems. If I switched on the lights were flashed once, and after not happened nothing. When I step into the main menu after few second it was turned off by itself. I had try to refresh the software, but the problem is the installation is started and till 44% was alright everything, after it was turned off, and didn't continued the installation. Please help me out, how can I fix it. Thanks Toldi