My mother bords smd chip does not work so display of screen does not appear

Maybe is the power supply source for the display .

HOLD D BUTTON ON KEYBOARD AND POWER ON THE LAPTOP

IF YOU GET COLOUR FULL SCREENS NO PROBLEM IN SCREEN

IF NO COLOURS DISPLAYED PROBLEM WITH SCREEN

this board on but no display

chnge the hdd

have you a graphics card you could use? if so you could try re-installing graphics drivers for the onboard graphics.
if not, to test the video output you would need a post test card, available for approx £15. this would enable you to test your motherboard completely.

reset your bios settings.
put away cmos cell for 15 minutes from mother bord.
then check if orblem remains still then u have change mother bord.

Boot into safemode. push F8 on startup until safemode option appears. If computer displays windows there, then it's most likley your resolution or your monitor frequenzy set to high/low.
change the resolution in safe mode, and the the frequenzy to 65 then restart your computer in normal mode.

intall its diver

mother board
not display show

The problem is well known witht this model Toshiba - the problem is the fan stops working and then hence shuts down to prevent overheating - it does not take long once the laptop is hot. Without replacing the fan just reboot the laptop until you hear the fan start again on reboot.