Announcement

Collapse
No announcement yet.

dell inspiron L502X NO POWER

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    dell inspiron L502X NO POWER

    hello,
    i have a dell insp l502x board no quanta DA0GM6C i have only stdy voltage +3.3v coming from tps51427 dc/dc the +5v is absent due to alw_on signal not there.i have checked the 3.3v login power on no problem there changed the micom ite8518e. I have doubts with the ec bios can anyone upload the dump for it.also does the ALW_ON come from the micom after power switch pressed or it is present always.anyone faced power issue with this laptop. pls helpp
    thanks

    #2
    Re: dell inspiron L502X NO POWER

    i have the same computer with bios password . i can upload the ec dump . will do it tomorrow but i need also yours (4Mb spi rom dump and 512kb ec dump)

    Comment


      #3
      Re: dell inspiron L502X NO POWER

      no problem does yours power on i will anyways upload for you the bios and ec pls check and let me know.
      thanks

      Comment


        #4
        Re: dell inspiron L502X NO POWER

        yes mine is working .just password on boot

        Comment


          #5
          Re: dell inspiron L502X NO POWER

          today will dismantle mine and will let you know If alw_on is always present or come after pressing power button .

          Comment


            #6
            Re: dell inspiron L502X NO POWER

            ok thanks meanwhile i am attaching the bios and ec.this one is without password but pls check the bios and tell me.
            Attached Files

            Comment


              #7
              Re: dell inspiron L502X NO POWER

              ok will let you know today

              Comment


                #8
                Re: dell inspiron L502X NO POWER

                wow wow wow wow wow wow wow wow wow wow wow wow wow it work fine the 4Mb dump thank you very very very very very very very very very much guruji thanks again.

                now for your faulty board notice that the ALW_On is always present when you plug the adapter . before pressing the power switch button you must get 3.3v and 5v . i think if you don't have 5v you must check arrond coil if there are no short or the tps51427 is dead

                Comment


                  #9
                  Re: dell inspiron L502X NO POWER

                  the ec dump is also good . sorry forgot to tell you

                  Comment


                    #10
                    Re: dell inspiron L502X NO POWER

                    okay that good pls can you click a good photo around the ite8515 as i think someone have removed some resistors. so i can see if any missin parts.
                    thanks

                    Comment


                      #11
                      Re: dell inspiron L502X NO POWER

                      do you have the diagram

                      Comment


                        #12
                        Re: dell inspiron L502X NO POWER

                        .
                        Attached Files

                        Comment


                          #13
                          Re: dell inspiron L502X NO POWER

                          yes i do have the schematics i am not getting alw_on does it come from the ec

                          Comment


                            #14
                            Re: dell inspiron L502X NO POWER

                            can you send me a photo of the components around ite8515e as i feel something missing

                            Comment


                              #15
                              Re: dell inspiron L502X NO POWER

                              have already screw the lapy. but notice that only with battery the alw_on signal come after tou press the power switch button . but with adapter the alw_on signal is already present when you plug it

                              Comment


                                #16
                                Re: dell inspiron L502X NO POWER

                                EC pin 83=alw_on = 3.3v

                                Comment


                                  #17
                                  Re: dell inspiron L502X NO POWER

                                  ec=ite8518 not ite8515

                                  Comment


                                    #18
                                    Re: dell inspiron L502X NO POWER

                                    tps51427=isl6237=rt8206b
                                    first check ONLDO signal pin4 of tps51427 onldo=+PWR_src*(pr122)/(pr121+pr122)

                                    then check LDO signal pin7 of tps 51427 LDO=+5v_ALW2

                                    the LDO signal activate +3.3_en1 an +5_en2 to provide +3.3v_ALW and +5_ALW

                                    Comment


                                      #19
                                      Re: dell inspiron L502X NO POWER

                                      Hi i have replaced the tps51427 also a new micom ic.i get all the voltages accept the +5v alwp.will check if there is a short in the 15v-alw.will check tomo anyhow
                                      Thanks again for your help.

                                      Comment


                                        #20
                                        Re: dell inspiron L502X NO POWER

                                        thanks dycc , guruji for sharing your files .

                                        Comment

                                        Working...
                                        X