HP 6735b/6535b memory issue

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  • bollin
    Senior Member
    • Mar 2013
    • 104
    • Finland

    #1

    HP 6735b/6535b memory issue

    I have got an hp 6735b where the motherboard died. It is equipped with the wwan module, but since replacement boards are expensive and I don´t want to waste that much money on it I ordered a as is board for a 6535b (basically the same, but without the wwan socket). I am going to move the socket later, first I need to get it working.

    The problem is that when both memory slots are occupied, it won´t post. Num lock & Caps lock blink three times, which indicates memory.

    But, when I remove memory from slot 1 (under the keyboard) it powers up.
    It doesn´t matter which one of the memory sticks I use, it simply wont power up with both slots occupied.

    The next step was to check the CPU, since the memory controller is on the cpu. So I changed to another known good processor, but still the same.

    What could cause this? There is a row of resistors (ddr2-damping), but I don´t believe that it is a resistor since nothing is burnt or anything.

    There might be a shorted pin somewhere in the slot, but at the first inspection everything seems ok.
  • Francisco.s
    Badcaps Veteran
    • Jan 2013
    • 685
    • Spain

    #2
    Re: HP 6735b/6535b memory issue

    Hi bollin, have a look to this link:

    http://www.ebay.es/itm/DDR2-memory-s...item4aa962e532

    DDR2 memory slot tester card for laptop motherboard.

    Comment

    • spleenharvester
      Badcaps Veteran
      • Mar 2010
      • 900
      • UK

      #3
      Re: HP 6735b/6535b memory issue

      Was the board bought as working? Might just be worth sending it back matey. Sounds like you've more or less narrowed it down to the board, unless it's an odd pair of sticks.

      EDIT: Oh wait I see it was as is. Sorry :/
      Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD

      Comment

      • spidey
        climbs
        • Dec 2012
        • 644
        • Cyprus

        #4
        Re: HP 6735b/6535b memory issue

        try bios update, and try to use same ram modules. is it an amd system ?

        Comment

        • bollin
          Senior Member
          • Mar 2013
          • 104
          • Finland

          #5
          Re: HP 6735b/6535b memory issue

          I will try to update the bios, it might be bad since everytime it boots up after I´ve tried starting it with memory in slot1, I get a message that the bios was restored.

          It is an AMD system

          Comment

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