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Toshiba Satellite L300-1A3 random blank screen

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    #1

    Toshiba Satellite L300-1A3 random blank screen

    I already disassembled the laptop, cleaned the fan and applied new thermal paste.

    That's what happens:

    https://www.youtube.com/watch?v=adicT5F6b00

    Any ideas?

    I will post more info later
    Tags: None
    #2
    Re: Toshiba Satellite L300-1A3 random blank screen

    Replace RAM to see if it is the faulty RAM that causing this freeze first and easier step. Does it happens randomly or when a heavy program tries to start like a game?

    Comment

      #3
      Re: Toshiba Satellite L300-1A3 random blank screen

      No wonder the poor toshiba l300 died .
      it was running league of legends :O HON its better :P
      Just cook it! It's already broken.

      Comment

        #4
        Re: Toshiba Satellite L300-1A3 random blank screen

        I have run MEMtest86+ v.4.10 several times without any errors.

        The blank screen happens while the pc is idle or light used in windows 7 SP1 installation or ubuntu running in live DVD mode...

        Comment

          #5
          Re: Toshiba Satellite L300-1A3 random blank screen

          Dimitrios I am Greek too

          Comment

            #6
            Re: Toshiba Satellite L300-1A3 random blank screen

            Check out the huge thread about the NEC/TOKIN capacitor. I'm fairly sure that's exactly what you have there.
            Originally posted by PeteS in CA
            Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
            A working TV? How boring!

            Comment

              #7
              Re: Toshiba Satellite L300-1A3 random blank screen

              What is the voltage on all pins (40 pins) of CN5 (LVDS connector) before (screen working) and when the screen goes blank (write them)?
              Last edited by atsio; 03-25-2014, 12:23 PM.

              Comment

                #8
                Re: Toshiba Satellite L300-1A3 random blank screen

                Originally posted by goodpsusearch View Post
                Dimitrios I am Greek too
                Noticed after I posted!! LOL! Agree with "Th3_uN1Qu3" by the way. My L300 is completely dead and have a shortage on 3.3VA rail but in your case it freezes on Windows. Must be NEC/TOKIN.
                Last edited by Dimitrios; 03-25-2014, 02:52 PM.

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                  #9
                  Re: Toshiba Satellite L300-1A3 random blank screen

                  Yep, Tokin cap.
                  Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD

                  Comment

                    #10
                    Re: Toshiba Satellite L300-1A3 random blank screen

                    And why that cap fails?

                    Comment

                      #11
                      Re: Toshiba Satellite L300-1A3 random blank screen

                      Ok, I read the entire thread (https://www.badcaps.net/forum/showthread.php?t=8991) and I decided to order 330uF Tantalum caps to substitute the NEC/TOKIN OE907 (2.5V 900uF 1.5 mΩ esr).

                      I can order from RS Greece:
                      http://gr.rsdelivers.com/catalogue/c...ors/10527.aspx

                      I think that these are suitable:

                      http://gr.rsdelivers.com/product/pan...f/7887422.aspx (2R5TPE330M7)

                      http://gr.rsdelivers.com/product/pan...f/7887457.aspx (2R5TPF330M7L)

                      I need your reassurance before I place the order... Are they compatible? Which of them is a better choice? I cannot find other difference than the price and the height.. Should I go for the cheaper?

                      Comment

                        #12
                        Re: Toshiba Satellite L300-1A3 random blank screen

                        4x330d resolved the problem even with heatgun

                        Comment

                          #13
                          Re: Toshiba Satellite L300-1A3 random blank screen

                          and yes your choice is good

                          Comment

                            #14
                            Re: Toshiba Satellite L300-1A3 random blank screen

                            I am newbee! My A300 shutdown in a few minutes since I start installing Windows 8 from DVD. If I put Hyren Boot DVD, my laptop boots from DVD and shutdown not happen? My HDD seems to be in good shape, normal, without problems as per HDtune! Any suggestion will be of great help!

                            Comment

                              #15
                              Re: Toshiba Satellite L300-1A3 random blank screen

                              With the Tokin cap problem it often doesn't shut down until it reaches Windows. This is because in the BIOS (and probably in the Hyren Boot DVD screen, I am not familiar with it though) the CPU frequency is limited to something very low (usually 400-800MHz). Once it reaches the Windows start screen, the CPU is stepped up to full speed and draws more and more current, which the failing capacitor cannot cope with.

                              Replacing the NEC Tokin cap, as per https://www.badcaps.net/forum/showthread.php?t=8991 should fix it.
                              Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD

                              Comment

                                #16
                                Re: Toshiba Satellite L300-1A3 random blank screen

                                Originally posted by breaker View Post
                                I am newbee! My A300 shutdown in a few minutes since I start installing Windows 8 from DVD.
                                Sounds like core overheating, just like HPs. Where it shut down on me when running the Windows 7 factory recovery installer.....

                                Crap core cooling??

                                Even when it can be bad caps like early 2000s desktops.....
                                Last edited by RJARRRPCGP; 03-31-2014, 04:49 PM.
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                                  #17
                                  Re: Toshiba Satellite L300-1A3 random blank screen

                                  Thanks to everybody for the help, this laptop is now working again just by removing NEC TOKIN cap and replacing it with 4 smd 330uF capacitors.
                                  Attached Files

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