I have a bit of a problem. My LCD Screen no longer lights up. I am attempting to replace the LCD screen myself. I checked the p/n number on the back to find out whether it is the Hitachi version or the Sony version, except it doesn't match the p/n of either screen. The P/N on my screen is 83H00389-01. Is this the Toshiba version of the screen because I can't seem to find out what the Toshiba p/n is even by googling.