L300 NEC TOKIN ??????? help please

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  • gcomputers
    Badcaps Veteran
    • Apr 2013
    • 509
    • Albania
    #1

    L300 NEC TOKIN ??????? help please

    Hi i have this satellite l300 power up 3 sec after restart again and stay on but no image on screen , i have a doubt that :

    Nec tokin problem , replaced with 4 x330u tantalium ,no change

    i checked coils have 3,3v have 5v , and coil of Cpu 0,95V
    CPU stay cool replaced cpu with the same model , no change

    replaced with other model now have 1,2v on coil and the cpu make too hot ,

    flashed bios , reflowed chipset , NO CHANGE , TURN ON 3 SEC AFTER RESTART AND STAY POWER ON ......................BUT NO SCREEN............................

    any suggestion please
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    • gcomputers
      Badcaps Veteran
      • Apr 2013
      • 509
      • Albania
      #2
      Re: L300 NEC TOKIN ??????? help please

      Any other idea what can i do?

        Comment

        • LP_tekh
          Senior Member
          • Oct 2015
          • 95
          • Laos
          #3
          Re: L300 NEC TOKIN ??????? help please

          Put 2 more caps, this kind is low in farad, and if i use this kind, i put 6pcs.
          I'm using the yellow type, is better than the one you got there.

            Comment

            • ktmmotocross
              Boardkiller
              • Feb 2014
              • 3577
              • slovakia
              #4
              Re: L300 NEC TOKIN ??????? help please

              reflow nb

                Comment

                • gcomputers
                  Badcaps Veteran
                  • Apr 2013
                  • 509
                  • Albania
                  #5
                  Re: L300 NEC TOKIN ??????? help please

                  Originally posted by ktmmotocross
                  reflow nb
                  reflowed but no change , i try too with 6x330 tantalium but the same .....

                    Comment

                    • Am0rPHiA
                      Member
                      • Nov 2011
                      • 31
                      • Greece
                      #6
                      Re: L300 NEC TOKIN ??????? help please

                      i have a motherboard L300 with the same symptoms , it powers on, does a restart and then sometimes it stays on or restarts again but with no post, i already replaced TOKIN with 6 x 330 tantalum, any ideas?

                        Comment

                        • highpulse
                          i hate HP
                          • May 2013
                          • 1488
                          • portugal
                          #7
                          Re: L300 NEC TOKIN ??????? help please

                          no ... im not sure i must chek one spare board here , but your nec specially the bottom one from the right side , is solder is between ground and positive (attention im not saying it is , but it looks like . and also if cpu is getting to hot , you gave to much heat on this area for a long perior of time .

                          my advise
                          remove all capacitors again
                          cleam board
                          and add only a pinch of solder on each contact of the capacitor ,

                            Comment

                            • highpulse
                              i hate HP
                              • May 2013
                              • 1488
                              • portugal
                              #8
                              Re: L300 NEC TOKIN ??????? help please

                              LP-TEKH using 6 is a wast of money and time ... 4 is more than enough for the job !

                                Comment

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