Dell 3542 7 beeps problem fixed

             7 beep means- cpu failure

   I check core voltage its okk

   

I know its very common prblm in this board 

       I jump to LPC line (pch- IO COMMUNICATION)

     RESISTOR (RN1806)  is nearest to soc realeated in LPC bus

   Rn1806 is network resister (4 resistor connect)

  4th resister in this network resister track miss 

  And I connect this track 

     Then, 

     Problem solved