1 Copper

15 R3, wont turn on after bios update

Does not turn on alienware logo is blinking 3 times red 1 time blue Then 3 times red and 1 time blue tried cmos reset tried power drain tried booting with 1 stick of ram nothing helps

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5 Tungsten

Re: Alienware 15r3 wont turn on after bios update

That light sequence indicates a bad CMOS battery (coin cell). Replace the battery, as the following support page explains.

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