BIOS Dell Latitude 7320 7420 7520 la-k371p

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Dell Latitude 7320 7420 7520 la-k371p
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Dell Latitude 7320 7420 7520 - GDC31 LA-K371P REV1.0.pdf
Dell Latitude 7320 7420 Compal GDC31 LA-K371P Rev 3.0 BoardView.cad
 

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DELL 7420 LA-K371P REV;3 WORKING FINE ON BATRY BUT AS U INSERT CHARGER LAPTOP SUDEN OFF,AND AGAIN NOT ON UNTIL U DISCONECT CHARGER AND RECONECT THE BATRY ,NO POWER ON ONLY ON CHARGER ,PLZ HELP WHAT COULD B THE PROBLEM?EVERY BASIC THING I HAVE ALREADY APLLIED,NO BURN OR HEATING COMPONENT FOUND ,NO MOISTURE FOUND
 
sir my laptop is 7420 model LA-K371P Rev 3.0 ,power onn on batry and working fine but miscelinious problem when plug in charger ,and no power only on charger ,and fan is ok but totaly no spin ,can u plz chek my bios dump and repair it ,thanks in advance
 

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now state has changed but no display still and fan is runing and on charger its not shut down ,and only on charger power led is on only,it has and ec chip too ,,can we have to program ec too?
 

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