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

Hello
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