Guy who brought computer said that he wanted to update bios him self and during procedure (in windows) something went bad and, after finishing, when you turn it on, just recive black screen. Before flashing, notebook worked 2 years without any problems. I downloaded bios file from toshiba and start Fn+F procedure from USB external floppy drive with crisdisk and BIOS file on it. He started to read BIOS from diskete and to flash it. After flashing situation was same. I tried with several diferent bios version and nothing changed.