Windows 10: No Toshiba logo when I turn laptop on

I have a Toshiba 2016 C70 series and all of a sudden when I turn it on it wont take me to toshiba start up logo. . Been rebooting it 12 times so far and still no sign in page. Any help would be greatly appreciated. thanks

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i cant see the toshiba logo when turning on my laptop

When i turning on my laptop I can't see the logo of the company produced it.because of that I can't go to boot menu of laptop

 

Toshiba Laptop Black Screen

I have a Toshiba Laptop, Was reinstalling windows 7 on it last night left it doing the updates then shut it down. Turned it on this this afternoon only to find the laptop screen is Black and also there is a burning smell coming from the Fan.

I connected the Laptop to a external monitor that is fine, Can go into bios, Windows boots up fine Etc.
Just took apart the laptop earlier to check all the cables where in correctly, Checked the motherboard over for any damage, burnt bits but but found nothing. Just put it back together now but im still getting this burning smell and i still cant use the laptop screen only a external screen.

I Tried Pressing FN+F5 to switch to the laptop screen, But still black screen. Any Suggestions please ?

Thanks

 

Blank screen after toshiba logo

Laptop was running a bit slugish so i reset it now it will not boot passed toshiba logo . I hve tried to enter safe enviroment with no luck tried windows 10 on usb and hve tried to use a monitor with no luck . Once the toshiba logo is there for 5 - 10
seconds it just gives me a light blank screen . Any help wld be awsome