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Ask dell latitude 5520 The sreen flashes different colors at start

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nassih

Registered member
hello everybody i have dell latitude 5520 I tried to open it to see the reference of the motherboard it had a password in the bios, I removed the ram and the battery, after I tried to restart is I fell on the problem of 3 blink orange 6 blink white and black screen, sometimes The screen flashes different colors at start.
tanks
 
the problem of the orange and white blinking led was solved , the lid which was badly placed and no making contact with motherboard, the problem of screen flashes different colors at start its the same
 
no , I didn't touch the motherboard, I just removed the battery to cut the power on the motherboard then I removed the ram to see if there is a model number underneath
 
no , I didn't touch the motherboard, I just removed the battery to cut the power on the motherboard then I removed the ram to see if there is a model number
 
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