Toshiba A105 will not boot up even with cd and f12
its not a booting issue if you hear the music, it loaded windows. you might have a display issue, shine a light on it to see if you can see any faint images, if you can the backlights out if not it might be the display adapter on the MOBO, in either situation calling toshiba would be required for a repair, or otherwise take it into a shop, but first try a power reset,
unplug it and remove the battery, then hold the power button down for one minute, replace the battery and power cord and try to boot again. if this fails call toshiba, its definately a hardware issue.