SDRAM problem

Discussion in 'General Electronics Chat' started by Jane1, Dec 27, 2011.

  1. Jane1

    Thread Starter New Member

    Sep 28, 2011
    13
    0
    From time to time I must repair an equipment that has its own BIOS, CPU and SDRAM
    This SDRAM has 256MB together and consists of 4 SDRAM modules(IC).
    Sometimes equipment does not work.Then there are several possibilities for that.
    Faulty CPU or BIOS or SDRAM.
    Is there a method how I can find out that SDRAM is faulty? If so which module of those 4 SDRAM modules might be faulty?
    Each SDRAM module has 66-pin Plastic TSOP(II) and is soldered on PCB.
    Thank you for help
     
  2. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
    804
    How about booting a memtest cd and checking the RAM for errors?
     
  3. Jane1

    Thread Starter New Member

    Sep 28, 2011
    13
    0
    It is not a PC. It is a linux embeded equipment.It either starts, or NOT. No possibility to boot up in a different way but from BIOS chip only
     
  4. kubeek

    AAC Fanatic!

    Sep 20, 2005
    4,670
    804
    Well then i think you would have to desolder each and test it, which could prove quite problematic. Also, as it is SDRAMs, which need refreshing every few μs, you might be better off either changing them all if you can get them or getting a new box rather than testing them separately.
     
Loading...