C850 satellite will not start - black screen with mouse cursor while

the screen while starting up is black with the cursor display white mouse - but won't start

the computer is only 3 months with windows 8

Please help me

Thank you

You mean underscore flashing/blinking in the upper left corner?
It is above all an indicator of malfunction of the HARD drive.

In your case, I recommend contacting the Toshiba authorised service provider because the laptop is 3 months old. In this case the warranty is still valid and you must have it repaired for free.

Tags: Toshiba

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