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    Toshiba L650 blown video?

    I have a L650 with no display. The lvds connector was pushed in reversed and created damage that way.
    U6200 was blown and after I replaced it all the voltage, 3V and 5V is back but stil no display. I checked the rest of the voltages 1,5;1,8 and they are there. also VBatt 19,46V. I'm stuck now.
    Can somebody guide me in the right direction?

    U6200
    1- entrip1 = 1,31V
    2- tonsel = 3,35V
    6- entrip2 = 1,31V
    8- Vreg3 = 3,35V
    16- Vin = 19,47V
    17- Vreg5 = 5,10V

    U3000
    1- LCM_BKLTEN = 0V
    2- EC_BKLTEN = 3,35V
    3- = gnd
    4- = 0V

    CN3000 jlvds1
    pin 2,3 = 0V
    pin 4 = 3,35V
    pin 5 = 3,35V
    pin 6 = 3,35V
    pin 7 till 19 = 0V
    pin 20 = 0V
    pin 23 = 5,11V
    pin 24 = 5,11V
    pin 25 = 19,5V
    pin 26 = 3,35V
    pin 27 = 1,5V
    pin 28,29,30 = 0V

    That is what I have been measuring up till now.
    I do not know where to go from here.

    thanks
    Last edited by hansie55; 08-17-2014, 01:15 PM.

    #2
    Re: Toshiba L650 blown video?

    It seems you need a new GPU. Check resistance to ground and voltage on L6700

    Comment


      #3
      Re: Toshiba L650 blown video?

      The schematic has to be from the BL10 and not the BL10G, which means the BL10 has not the L6700, but a simular circuit with the L6400. (circuit is different, pls check.)
      The voltage over the L6400 = 0,5V and from each side to gnd = 1,07V and 1,09V
      The resistance to gnd = 12 Ohm

      The GPU is intergrated in the CPU, i3-330M and I changed it already with no result.
      Attached Files
      Last edited by hansie55; 08-17-2014, 05:06 PM.

      Comment


        #4
        Re: Toshiba L650 blown video?

        New PCH

        Comment


          #5
          Re: Toshiba L650 blown video?

          Thanks for your help.

          Sorry to hear that's the one, I was afraid of that. I was hoping for a less complicated solution. This will be end of story for this board.
          Were te values of L6400 corect? On what did you base your conclusion? I like to learn.

          Were the otther values in the above list correct?
          Last edited by hansie55; 08-18-2014, 12:51 AM.

          Comment


            #6
            Re: Toshiba L650 blown video?

            hansie55 you need to trace pin 2 and 3 you got +V3S there and its very important and LCM_3S_VDDEN that comes from the chipset.

            if you do manage to find the 3v maybe.
            I think that you need to do something like this correct me if I`m wrong.

            1. inject 3v to the connector and see if you got backlight.

            2. inject 3v and see if the chipset gets hot
            in this case you don't need 3v 1v its ok. find the coils that goes to the chipset.
            I`ll take a notebook with me at work and we can find other problems.
            Just cook it! It's already broken.

            Comment


              #7
              Re: Toshiba L650 blown video?

              does it work with VGA cable connected? because its connected to the chipset

              CRT_B
              CRT_G
              CRT_R
              Just cook it! It's already broken.

              Comment


                #8
                Re: Toshiba L650 blown video?

                on INV_PWM_3 its connected to a resistor R4682 there you can inject the voltage to see if you got backlight.

                you got a lot of work come on give us after some feedback.
                Just cook it! It's already broken.

                Comment


                  #9
                  Re: Toshiba L650 blown video?

                  Originally posted by dj_ricoh View Post
                  does it work with VGA cable connected? because its connected to the chipset

                  CRT_B
                  CRT_G
                  CRT_R
                  Thanks for your reaction
                  No, no vga, no hdmi

                  Comment


                    #10
                    Re: Toshiba L650 blown video?

                    ok before the chipset its U301 NPCE781LA0DX KBC omfg.

                    that's hard!

                    lets do this.
                    Just cook it! It's already broken.

                    Comment


                      #11
                      Re: Toshiba L650 blown video?

                      if I`m wrong plzz correct me! +V3S comes from U6603 TPS51621 RHAR

                      this TPS apparently its important to check it .
                      V please, from this chip. Its important.
                      Just cook it! It's already broken.

                      Comment


                        #12
                        Re: Toshiba L650 blown video?

                        OK! this is not important its very important!

                        CLKEN# its connected to that +3vS pin34 with TRIPSEL pin 31
                        a lot of resistors there.

                        bring your best DMM in this game you will need it
                        Just cook it! It's already broken.

                        Comment


                          #13
                          Re: Toshiba L650 blown video?

                          Originally posted by dj_ricoh View Post
                          hansie55 you need to trace pin 2 and 3 you got +V3S there and its very important and LCM_3S_VDDEN that comes from the chipset.

                          if you do manage to find the 3v maybe.
                          I think that you need to do something like this correct me if I`m wrong.

                          1. inject 3v to the connector and see if you got backlight.

                          2. inject 3v and see if the chipset gets hot
                          in this case you don't need 3v 1v its ok. find the coils that goes to the chipset.
                          I`ll take a notebook with me at work and we can find other problems.
                          LCM_3S_VDDEN stays 0V

                          1.no backlight
                          2. chip does not get hot

                          Comment


                            #14
                            Re: Toshiba L650 blown video?

                            Originally posted by dj_ricoh View Post
                            on INV_PWM_3 its connected to a resistor R4682 there you can inject the voltage to see if you got backlight.

                            you got a lot of work come on give us after some feedback.
                            no backlight

                            When I take the 3V from Q3001 pin 3 and connect to R4682, it drops to 0V
                            Taken from Pad 6301 it stays 3,35V
                            Last edited by hansie55; 08-18-2014, 03:58 AM.

                            Comment


                              #15
                              Re: Toshiba L650 blown video?

                              Originally posted by dj_ricoh View Post
                              OK! this is not important its very important!

                              CLKEN# its connected to that +3vS pin34 with TRIPSEL pin 31
                              a lot of resistors there.

                              bring your best DMM in this game you will need it
                              U6603

                              pin 1 = 0V
                              pin 3,4,5,6, = 1,12V
                              pin 7 = 0V
                              pin 8 = 1,12V
                              pin 9 = 1,25V
                              pin 10 = 1,06V
                              pin 11,12, = 0,2V
                              pin 13,15,16,17,18,20 = 1,0V
                              pin 14 = 0V
                              pin 21 = 1,25V
                              pin 22 = 5,60V
                              pin 23 = 1,12V
                              pin 24 = 0V
                              pin 26 = 5,60V
                              pin 27 = 2,7V
                              pin 28 = 1,12V
                              pin 29 = 5,59V
                              pin 30 = 1,26V
                              pin 31 = 3,35V
                              pin 32 = 5,00V
                              pin 33 = 3,33V
                              pin 34 = 0V
                              pin 35,36,39,40 = 1,69V
                              pin 37 = 1,24V
                              pin 38 = 5,08V

                              Comment


                                #16
                                Re: Toshiba L650 blown video?

                                Originally posted by dj_ricoh View Post
                                OK! this is not important its very important!

                                CLKEN# its connected to that +3vS pin34 with TRIPSEL pin 31
                                a lot of resistors there.

                                bring your best DMM in this game you will need it
                                The resistors value

                                R6613 = 1,9k
                                R6661 = 0 Ohm, There is no value given in the schematics and is a shortcut?
                                R6610 = 10k
                                R6656 = 0 Ohm, There is no value given in the schematics and is a shortcut?

                                Comment


                                  #17
                                  Re: Toshiba L650 blown video?

                                  Originally posted by hansie55 View Post
                                  no backlight

                                  When I take the 3V from Q3001 pin 3 and connect to R4682, it drops to 0V
                                  Taken from Pad 6301 it stays 3,35V
                                  it drops to 0 when the screen its connected?
                                  take the cable out
                                  Just cook it! It's already broken.

                                  Comment


                                    #18
                                    Re: Toshiba L650 blown video?

                                    Originally posted by dj_ricoh View Post
                                    it drops to 0 when the screen its connected?
                                    take the cable out
                                    it also drops when teh screen in not connected

                                    Comment


                                      #19
                                      Re: Toshiba L650 blown video?

                                      find u6500 and see the voltage ok?
                                      we need to identify everything and compare so we can conclude if actually the chipset its broken.

                                      do you have a lab psu?
                                      Just cook it! It's already broken.

                                      Comment


                                        #20
                                        Re: Toshiba L650 blown video?

                                        i got the sheet from that PM6652. we need see the voltage and see whats going on there.
                                        Attached Files
                                        Just cook it! It's already broken.

                                        Comment

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