C850D beep no ram but no boot no image

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  • Learn2Day
    Badcaps Veteran
    • Jun 2013
    • 254
    • Portugal

    #1

    C850D beep no ram but no boot no image

    Hey,

    I just got a C850D that turns on but no image and doesn't boot. But it gives me beep error with no RAM in it.

    Could this be BIOS? I have a spare board of exact same model I can replace BIOS with, but before that, is there any BIOS recovery procedure available for this?

    Thanks.
    Galaxy S6 Edge x2 (Gold&White)
    Asus GL552VW-i7 6700HQ|GTX 960M|15.6"FHD|16GB DDR4|512GB M.2 SSD+1TB SSD
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  • atsio
    Badcaps Veteran
    • Oct 2013
    • 819
    • Greece

    #2
    Re: C850D beep no ram but no boot no image

    First try another CPU.

    Comment

    • Learn2Day
      Badcaps Veteran
      • Jun 2013
      • 254
      • Portugal

      #3
      Re: C850D beep no ram but no boot no image

      Another CPU didn't worked. Also might be worth mentioning I hear a short crackling sound coming from the speakers when I turn on laptop.
      Galaxy S6 Edge x2 (Gold&White)
      Asus GL552VW-i7 6700HQ|GTX 960M|15.6"FHD|16GB DDR4|512GB M.2 SSD+1TB SSD
      Clevo W230SD - i7 4710MQ|GTX960M|13"QHD+|16GB DDR3L|500GB+256GB mSATA SSD+1TB HDD

      Try Harder!

      Comment

      • Learn2Day
        Badcaps Veteran
        • Jun 2013
        • 254
        • Portugal

        #4
        Re: C850D beep no ram but no boot no image

        CPU, GPU and NB are heating up significantly. But after a few seconds fan kicks in and the seem to hold their temperature in check.. In a minute or so laptop turns off but it's hard to say if this is related to temp or not, considering you have no visible boot.

        What do you guys think, should I start with BIOS or just do a quick reflow to see if it boots? I usually like to avoid reflow until all options are exhausted, I'm always afraid to damage the board.

        Thanks.
        Galaxy S6 Edge x2 (Gold&White)
        Asus GL552VW-i7 6700HQ|GTX 960M|15.6"FHD|16GB DDR4|512GB M.2 SSD+1TB SSD
        Clevo W230SD - i7 4710MQ|GTX960M|13"QHD+|16GB DDR3L|500GB+256GB mSATA SSD+1TB HDD

        Try Harder!

        Comment

        • atsio
          Badcaps Veteran
          • Oct 2013
          • 819
          • Greece

          #5
          Re: C850D beep no ram but no boot no image

          measure voltages on all pins of lvds.

          Comment

          • Learn2Day
            Badcaps Veteran
            • Jun 2013
            • 254
            • Portugal

            #6
            Re: C850D beep no ram but no boot no image

            pins 3, 35, 37, 39 - 3.3V
            pins 2, 4 - 19V
            all other pins read virtually 0V.
            Didn't mention before but I did test laptop both with display and external.

            Thanks.
            Galaxy S6 Edge x2 (Gold&White)
            Asus GL552VW-i7 6700HQ|GTX 960M|15.6"FHD|16GB DDR4|512GB M.2 SSD+1TB SSD
            Clevo W230SD - i7 4710MQ|GTX960M|13"QHD+|16GB DDR3L|500GB+256GB mSATA SSD+1TB HDD

            Try Harder!

            Comment

            • atsio
              Badcaps Veteran
              • Oct 2013
              • 819
              • Greece

              #7
              Re: C850D beep no ram but no boot no image

              What is the model of the motherboard?

              Comment

              • Learn2Day
                Badcaps Veteran
                • Jun 2013
                • 254
                • Portugal

                #8
                Re: C850D beep no ram but no boot no image

                Not quite sure.
                Seems to be PLAC/CSAC DSC REV:2.1
                thanks
                Galaxy S6 Edge x2 (Gold&White)
                Asus GL552VW-i7 6700HQ|GTX 960M|15.6"FHD|16GB DDR4|512GB M.2 SSD+1TB SSD
                Clevo W230SD - i7 4710MQ|GTX960M|13"QHD+|16GB DDR3L|500GB+256GB mSATA SSD+1TB HDD

                Try Harder!

                Comment

                • Learn2Day
                  Badcaps Veteran
                  • Jun 2013
                  • 254
                  • Portugal

                  #9
                  Re: C850D beep no ram but no boot no image

                  Can someone help me find the schematics and locating BIOS chip on this model?

                  Thanks.
                  Galaxy S6 Edge x2 (Gold&White)
                  Asus GL552VW-i7 6700HQ|GTX 960M|15.6"FHD|16GB DDR4|512GB M.2 SSD+1TB SSD
                  Clevo W230SD - i7 4710MQ|GTX960M|13"QHD+|16GB DDR3L|500GB+256GB mSATA SSD+1TB HDD

                  Try Harder!

                  Comment

                  • atsio
                    Badcaps Veteran
                    • Oct 2013
                    • 819
                    • Greece

                    #10
                    Re: C850D beep no ram but no boot no image

                    Your are looking for Pegatron PLAC/CSAC DSC REV:2.1 which is quite difficult to find.

                    Comment

                    • Learn2Day
                      Badcaps Veteran
                      • Jun 2013
                      • 254
                      • Portugal

                      #11
                      Re: C850D beep no ram but no boot no image

                      Do you think it might be corrupt BIOS? I don't think it's GPU related, with GPU probably wouldn't even post beep errors.
                      Galaxy S6 Edge x2 (Gold&White)
                      Asus GL552VW-i7 6700HQ|GTX 960M|15.6"FHD|16GB DDR4|512GB M.2 SSD+1TB SSD
                      Clevo W230SD - i7 4710MQ|GTX960M|13"QHD+|16GB DDR3L|500GB+256GB mSATA SSD+1TB HDD

                      Try Harder!

                      Comment

                      • atsio
                        Badcaps Veteran
                        • Oct 2013
                        • 819
                        • Greece

                        #12
                        Re: C850D beep no ram but no boot no image

                        You will never know until you try it

                        Comment

                        • Learn2Day
                          Badcaps Veteran
                          • Jun 2013
                          • 254
                          • Portugal

                          #13
                          Re: C850D beep no ram but no boot no image

                          Can you help locate BIOS chip? I'm all that much noob..

                          http://www.filefactory.com/file/5sjs...AC_DSC_2.1.rar

                          Thanks.
                          Last edited by Learn2Day; 04-10-2014, 06:24 AM.
                          Galaxy S6 Edge x2 (Gold&White)
                          Asus GL552VW-i7 6700HQ|GTX 960M|15.6"FHD|16GB DDR4|512GB M.2 SSD+1TB SSD
                          Clevo W230SD - i7 4710MQ|GTX960M|13"QHD+|16GB DDR3L|500GB+256GB mSATA SSD+1TB HDD

                          Try Harder!

                          Comment

                          • lezsimply
                            The Wanderer
                            • Jan 2013
                            • 645
                            • Philippines

                            #14
                            Re: C850D beep no ram but no boot no image

                            On pic 002, left side near memory card reader beside ati chip. Its labeled winbond which I think is a 200mil soic.

                            Comment

                            • Learn2Day
                              Badcaps Veteran
                              • Jun 2013
                              • 254
                              • Portugal

                              #15
                              Re: C850D beep no ram but no boot no image

                              Thank you lezsimply!!
                              Galaxy S6 Edge x2 (Gold&White)
                              Asus GL552VW-i7 6700HQ|GTX 960M|15.6"FHD|16GB DDR4|512GB M.2 SSD+1TB SSD
                              Clevo W230SD - i7 4710MQ|GTX960M|13"QHD+|16GB DDR3L|500GB+256GB mSATA SSD+1TB HDD

                              Try Harder!

                              Comment

                              • Learn2Day
                                Badcaps Veteran
                                • Jun 2013
                                • 254
                                • Portugal

                                #16
                                Re: C850D beep no ram but no boot no image

                                Hey, I really need your help..

                                I replaced BIOS chip with the spare one I had and tadaaa!! It worked!

                                After this I re-assembled the laptop, powered it on, entered BIOS, changed the time and saved it. Got no media error due to formatted hdd, rebooted to boot Win instalation and it froze! Now it won't turn on or even light the charge battery led!

                                What did I do wrong?

                                I already tried to remove CMOS battery, battery, charger, it simply doesn't power on.

                                Please HEEELLPP!!

                                Thanks.
                                Galaxy S6 Edge x2 (Gold&White)
                                Asus GL552VW-i7 6700HQ|GTX 960M|15.6"FHD|16GB DDR4|512GB M.2 SSD+1TB SSD
                                Clevo W230SD - i7 4710MQ|GTX960M|13"QHD+|16GB DDR3L|500GB+256GB mSATA SSD+1TB HDD

                                Try Harder!

                                Comment

                                • highpulse
                                  i hate HP
                                  • May 2013
                                  • 1488
                                  • portugal

                                  #17
                                  Re: C850D beep no ram but no boot no image

                                  if im not mistaquen your SIO chip is a nuvoton 781 , if after replacement machine worked , and after a while died again ,could be the SIO chip damaged , making your bios to get corrupted , try replace Sio chip , and reflash bios again , and let us know

                                  Comment

                                  • Learn2Day
                                    Badcaps Veteran
                                    • Jun 2013
                                    • 254
                                    • Portugal

                                    #18
                                    Re: C850D beep no ram but no boot no image

                                    Thanks,

                                    But 1st, I don't have a BIOS programmer, and second i need help locating SIO chip.
                                    Galaxy S6 Edge x2 (Gold&White)
                                    Asus GL552VW-i7 6700HQ|GTX 960M|15.6"FHD|16GB DDR4|512GB M.2 SSD+1TB SSD
                                    Clevo W230SD - i7 4710MQ|GTX960M|13"QHD+|16GB DDR3L|500GB+256GB mSATA SSD+1TB HDD

                                    Try Harder!

                                    Comment

                                    • lezsimply
                                      The Wanderer
                                      • Jan 2013
                                      • 645
                                      • Philippines

                                      #19
                                      Re: C850D beep no ram but no boot no image

                                      On pic 001, left side the big square one with many pins. close to hole H6502 and H6525. With marking NUOVOTON

                                      Comment

                                      • Learn2Day
                                        Badcaps Veteran
                                        • Jun 2013
                                        • 254
                                        • Portugal

                                        #20
                                        Re: C850D beep no ram but no boot no image

                                        Thanks.

                                        Confirmed it's not SIO chip. Soldered last BIOS again and laptop turns on again, RAM error, etc..

                                        I need to flash BIOS but I don't have a BIOS programmer on me. Only thing it comes to mind is try a crisis recovery.

                                        Can anyone help me here?

                                        Thanks.
                                        Galaxy S6 Edge x2 (Gold&White)
                                        Asus GL552VW-i7 6700HQ|GTX 960M|15.6"FHD|16GB DDR4|512GB M.2 SSD+1TB SSD
                                        Clevo W230SD - i7 4710MQ|GTX960M|13"QHD+|16GB DDR3L|500GB+256GB mSATA SSD+1TB HDD

                                        Try Harder!

                                        Comment

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