Turn on lap top no screen image

how old is it?

your motherboard may have any loose connection ..............check it at first

There is problem in cablee

If you have diverted the screen output to an external monitor or a TV, turn off the computer then disconnect the TV or monitor and turn computer back on again. The computer LCD is the default screen.

you may need to tell the lap top to display from that screen the new screen has no image or signal so goes to sleep to save power.on your lap top try the (FN) key on your laptop then select a blue picture on the keyboad of to squears one black one blue this will alter the display.OR in windows look at Start>controal pannel>display

If this laptop has wireless built in then all you have to do is puch down Fn key that is usually blue by left CTRL key and while holding it look at your F keys and find the one that looks like signal and push it and that is it Some new ones have started putting switches on front of laptops like a little slider switch. First one usually works.

boot from CD need the OP SYS or recovery disk that came with the computer

to get itno safe mode u have to start pushing the F8 key when you turn you com. on then choose safe mode and if any of that dont work you will need a new start up disk sorry...

The same thing happened to me, You might want to replace your ds touch screen...

the resolution may have changed. reselect the computer or auto-image.