Toshiba blank screen (no video at all), no system boot, power led is on after pushing the power button, seems to start but doesn't go ahead, no video on external monitor.

Toshiba blank screen (no video at all), no system boot, power led is on after pushing the power button, seems to start but doesn't go ahead, no video on external monitor.

We need to remove the power adapter and the battery (if possible).

Press the power button for 10 seconds o 60 seconds if you have a non removable battery.

Connect the power adapter and try to power on.

If it doesn't work check that the fan is spinning after pushing the  power button.
If the fan is "stuck" it's possible that you've, in the worst scenario, fried something due to overheating.
Try to let the fan start spinning again by blowing in the air holes... use an air compressor (from a distance) or your own mouth. After blowing air try to power on the computer and see if the fan runs again and, if you are lucky, the notebook starts regularly.

Another possibility are a few key combinations that should hard reset (nothing related to the operating system) the notebook
esc+power (for 6seconds)
fn+f8+power (for 10 seconds)






If the fan is running and the screen is still black probably you have the last chance into reflowing the chipset due to possible damages done by overheating.