Ram getting heat and become unusable

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  • samanthban
    Badcaps Veteran
    • Feb 2014
    • 253
    • Sri lanka

    #1

    Ram getting heat and become unusable

    If you have any previous experience with this indecent please help me.
    I got a acer v3 - 571 with no display . ram was so hot . I changed it for new
    ram work fine but within one hour .new ram also be unusable and no display
    occurs.ram voltage shows 1.5v.

    Thanks..
    sigpic
  • ala_borbe
    aka Donald
    • Apr 2011
    • 1625
    • Malta

    #2
    Re: Ram getting heat and become unusable

    there is 2 types of ddr3 ram... DDR3 and DDR3L

    make sure you have a right one, cos thay run on different voltages
    Im Back... sort of...

    Comment

    • Esse
      Badcaps Veteran
      • Apr 2014
      • 317
      • TOGO

      #3
      Re: Ram getting heat and become unusable

      physicaly is there any slight difference between these two RAM?

      Comment

      • ala_borbe
        aka Donald
        • Apr 2011
        • 1625
        • Malta

        #4
        Re: Ram getting heat and become unusable

        nope, thay are identical
        Im Back... sort of...

        Comment

        • keeney123
          Lauren
          • Sep 2014
          • 2536
          • United States

          #5
          Re: Ram getting heat and become unusable

          First have you had this unit for some time or did you receive it in this condition? If you received it this way do you have any schematics to it? Perhaps it may have a wrong resister value in it that is causing more current to go to the Ram? If you have had this computer for some time and it failed then I would suspect a bad component causing an over current condition to ram until the circuit protection cuts it off. Could also have a bad electrolytic? It is hard to tell with out taking measurements and without having a schematic to go by. Even it someone had the same condition their condition could be caused by something else.

          Comment

          • samanthban
            Badcaps Veteran
            • Feb 2014
            • 253
            • Sri lanka

            #6
            Re: Ram getting heat and become unusable

            Originally posted by ala_borbe
            there is 2 types of ddr3 ram... DDR3 and DDR3L

            make sure you have a right one, cos thay run on different voltages
            Thanks for reply as per my knowledge ddr3-1.5v and ddr3l compatible for 1.5v or 1.35v .I have 1.5v in ram slot .
            sigpic

            Comment

            • samanthban
              Badcaps Veteran
              • Feb 2014
              • 253
              • Sri lanka

              #7
              Re: Ram getting heat and become unusable

              Originally posted by keeney123
              First have you had this unit for some time or did you receive it in this condition? If you received it this way do you have any schematics to it? Perhaps it may have a wrong resister value in it that is causing more current to go to the Ram? If you have had this computer for some time and it failed then I would suspect a bad component causing an over current condition to ram until the circuit protection cuts it off. Could also have a bad electrolytic? It is hard to tell with out taking measurements and without having a schematic to go by. Even it someone had the same condition their condition could be caused by something else.
              I received in this condition but I changed the ram module and work for one hour
              later that ram module also be unusable .I have the schematic and will attach it.if you have a previous experience please tell me how to start.
              sigpic

              Comment

              • samanthban
                Badcaps Veteran
                • Feb 2014
                • 253
                • Sri lanka

                #8
                Re: Ram getting heat and become unusable

                here its
                Attached Files
                sigpic

                Comment

                • keeney123
                  Lauren
                  • Sep 2014
                  • 2536
                  • United States

                  #9
                  Re: Ram getting heat and become unusable

                  I have some experience I am not an expert.Seeing how no one else is stepping up I will help you with what I know. Can you verify that both of the Ram boards are bad and not one. This will help in pointing in a direction to go. It seems that there is a 1k ohm voltage divider that is use to set up the reference voltage of 1.5 volts. So that input needs to be O.75 volts to output the 1.5 voltages. This is just a quick look at it. The first thing is to verify that both Ram boards are bad or are you using only one Ram Board?
                  Last edited by keeney123; 05-29-2016, 08:27 AM.

                  Comment

                  • keeney123
                    Lauren
                    • Sep 2014
                    • 2536
                    • United States

                    #10
                    Re: Ram getting heat and become unusable

                    Here is the data sheet to the 204 pin DDR3 Ram chip. This should help you understand what the pins do. I would be concern with the voltage pins as there are terminating voltage etc. that you also need to look at. So Study this data sheet and see what you can decipher. If you still need help after that then let me know and I can look into it further.
                    Attached Files

                    Comment

                    • samanthban
                      Badcaps Veteran
                      • Feb 2014
                      • 253
                      • Sri lanka

                      #11
                      Re: Ram getting heat and become unusable

                      Originally posted by keeney123
                      Here is the data sheet to the 204 pin DDR3 Ram chip. This should help you understand what the pins do. I would be concern with the voltage pins as there are terminating voltage etc. that you also need to look at. So Study this data sheet and see what you can decipher. If you still need help after that then let me know and I can look into it further.

                      Busy with day to day works will ba back with your suggestions Thanks
                      sigpic

                      Comment

                      • mehtabbukhari
                        Lets help
                        • May 2016
                        • 26
                        • India

                        #12
                        Re: Ram getting heat and become unusable

                        Hi,

                        I would suggest you also check termination voltage ie 0.75 going to the RAM.'

                        Page 49: ON RT8207 check pin 20 (+0.75VSP)
                        Page 49: ON RT8207 check pin 4
                        ON RAM Slot pin 199 should not be more than +3.3V

                        Hope this was helpful.

                        Comment

                        • samanthban
                          Badcaps Veteran
                          • Feb 2014
                          • 253
                          • Sri lanka

                          #13
                          Re: Ram getting heat and become unusable

                          Thanks everybody this was not able to fix and bit of risky to do much
                          experiment due to the lap is in working condition .return back to the customer .Thanks everybody.
                          sigpic

                          Comment

                          • jiroy
                            Badcaps Legend
                            • Jun 2016
                            • 2416
                            • Lebanon

                            #14
                            Re: Ram getting heat and become unusable

                            Those are the usual common faults that many fall in always , Putting a Ram with an incompatible bus speed to the system . DDR3 Comes with lot of different buses like 8500 , 10200 and 12600 . Disrespecting those rates might cause lot of trouble when placed in an incompatible system .
                            Some Mobos have stronger abilities to detect incompatipibility while cheaper designs do not .

                            Comment

                            • samanthban
                              Badcaps Veteran
                              • Feb 2014
                              • 253
                              • Sri lanka

                              #15
                              Re: Ram getting heat and become unusable

                              Originally posted by jiroy
                              Those are the usual common faults that many fall in always , Putting a Ram with an incompatible bus speed to the system . DDR3 Comes with lot of different buses like 8500 , 10200 and 12600 . Disrespecting those rates might cause lot of trouble when placed in an incompatible system .
                              Some Mobos have stronger abilities to detect incompatipibility while cheaper designs do not .
                              Thanks for your information
                              sigpic

                              Comment

                              • jiroy
                                Badcaps Legend
                                • Jun 2016
                                • 2416
                                • Lebanon

                                #16
                                Re: Ram getting heat and become unusable

                                Originally posted by samanthban
                                Thanks for your information
                                Welcome friend . Let me tell you this little trick i always use . I put on the net search "upgrade laptop rams" , and it will take you to many seller rams sites giving exactly the specifications of a Laptop ram . Fast and effective .

                                Comment

                                • diif
                                  Badcaps Legend
                                  • Feb 2014
                                  • 6978
                                  • England

                                  #17
                                  Re: Ram getting heat and become unusable

                                  Originally posted by jiroy
                                  Those are the usual common faults that many fall in always , Putting a Ram with an incompatible bus speed to the system . DDR3 Comes with lot of different buses like 8500 , 10200 and 12600 . Disrespecting those rates might cause lot of trouble when placed in an incompatible system .
                                  Some Mobos have stronger abilities to detect incompatipibility while cheaper designs do not .
                                  8500, 10200 and 12600 etc are not bus speeds these are the peak transfer rate in MB/s.
                                  In 15 years of building computers and laptops. Ignoring faulty ram or parts of it, memory either works in a system and it boots up or it does not. Memory will happily down clock.
                                  Crucial.com is an excellent way to check what memory a device requires.

                                  Comment

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