Sin bios / no bios, please help!

I change things in bios and now no bios, black screen, no windows, i need help please

Le modifique parámetros en la bios y ahora no arranca ni la bios ni Windows por favor ayúdenme la ocupo para mi escuela
Please help me i need the laptop for school

Solution : open laptop, remove the battery cable, wait 20 minutes and put the cable again
And bios works again

Your computer may need to be repaired. Please send the specific problems of your machine to this email: They will give you advice.
Thank you for your letter