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Apple Apple iMac 27" Late 2013 (820-3481-A)

Esta es mi bios original, pero no me da imagen, con otra bios de internet me da imagen pero esta bloqueada en el logo. puedes arreglarlo, gracias
 

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820-3481-a.BIN
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I have updated this bios and I get blue lines on the screen and the operating system does not recognize me.
I've reballed the GPU and they keep coming up.
With another Bios I don't get the lines, what could be happening?
 

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IMG_20220822_104344.jpg
I have updated this bios and I get blue lines on the screen and the operating system does not recognize me.
I've reballed the GPU and they keep coming up.
With another Bios I don't get the lines, what could be happening?
i don't know either but it could be bios problem
 
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