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Dell Latitude 5420, Coloured screens from one colour to another continuous.

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    Dell Latitude 5420, Coloured screens from one colour to another continuous.

    Hello all, I have a Dell Latitude 5420, before I upload the bios I thought I would ask. All I am getting is are coloured screens from one colure to another continuous that's all its doing.
    I have searched on google some say this is a graphics problem and not a bios problem. I did try another bios file from the forum it stops at the Dell logo.
    With the original chip fitted I am getting error code 3 amber and 3 white flashes.

    Any advice please ?.
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