A friendjust had a battery replaced in a 2000 RX300. Ever since then the LCD screen has quit working. Is this a quick fix,was something overlooked when hooking things back up or is this just an unrelated problem? Fuses have been checked and all seem to be good. Turning up the brightness hasn't done it either.

not likely caused by replacing the battery. sounds like a different issue. probably needs a new head unit/screen. good luck