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Samsung service menu problem

Discussion in 'Electronic Repair' started by LeChuck, May 21, 2006.

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  1. LeChuck

    LeChuck Guest

    Hello,

    I'm wondering is someone can help with this issue. I was unfortunately
    going through the service menu of my Samsung TX-R2435 (to see if I
    could find any hint of a "wide" mode, which is advertised everywhere
    for this TV, which I bought used) when I hit an option that I shouldn't
    have touched. Actually I didn't think it was a command but an access to
    a sub-menu. Anyway, it was called "bus stop" and what it did is
    actually deactivate all controls in the TV (as well as the service menu
    itself). I had to unplug it to get it to turn off. Now, when I try to
    turn it on again, the light goes green as normal but then turns off
    after one second and the TV remains blank (it does "charge up"). I have
    tried leaving it unplugged for 4 hours but it didn't reset anything
    apparently. It's as if it is locked into a perpetual state of going on
    stand-by.

    Does anybody have any idea on what is happening and how to fix it.

    Thanks!
     
  2. JANA

    JANA Guest

    It is possible for you to lock out the initialization of some of these sets.
    The Samsung sets are normally set up with an external interface. The type
    depends on the models series. Take the set to an authorized Samsung dealer
    to have the EPROM firmware initialization re-set.

    --

    JANA
    _____


    <LeChuck> wrote in message
    Hello,

    I'm wondering is someone can help with this issue. I was unfortunately
    going through the service menu of my Samsung TX-R2435 (to see if I
    could find any hint of a "wide" mode, which is advertised everywhere
    for this TV, which I bought used) when I hit an option that I shouldn't
    have touched. Actually I didn't think it was a command but an access to
    a sub-menu. Anyway, it was called "bus stop" and what it did is
    actually deactivate all controls in the TV (as well as the service menu
    itself). I had to unplug it to get it to turn off. Now, when I try to
    turn it on again, the light goes green as normal but then turns off
    after one second and the TV remains blank (it does "charge up"). I have
    tried leaving it unplugged for 4 hours but it didn't reset anything
    apparently. It's as if it is locked into a perpetual state of going on
    stand-by.

    Does anybody have any idea on what is happening and how to fix it.

    Thanks!
     
  3. LeChuck

    LeChuck Guest

    It seems an EEPROM for that TV costs about $6. If changing it would fix
    the problem maybe I could just go ahead and do it myself, but what are
    the chances of it being actually the problem? I actually did not enter
    the "EEPROM" submenu in the service menu.
     
  4. Art

    Art Guest

    This is exactly why we warn customers about not to attempt using the Service
    Only Menues on their products.
    I understand, you did purchase the product, do own it, therefore you have
    the abosolute right to destroy it in any matter you prefer. However, when
    you request information as to how to un-do your FUBARD and do not choose the
    obvious recommondation, then we are at a loss to assist any further. Order
    the E-Prom, hopefully it comes with the proper programming code already
    loaded, hopefully you do not flack it with ESD while attempting to change
    it. Enjoy!!
     
  5. LeChuck

    LeChuck Guest

    I''ve been a computer specialist for 12 years, have already done some
    electronics stuff (following how-tos), and I've setup many things
    including CRT projectors and the like. I'm fairly accustomed to go into
    service menus, and also accustomed to tweak things that should already
    properly work out of the factory.

    In this case, I'd ask how good is a "self-destroy" option in a service menu.

    I could already figure out the "take it to a repair shop" part without
    posting a request for help. I post in order to find something that I
    can do *myself*. I don't want to pay $100 to replace a $5 component in
    a TV I paid $50.
     
  6. LeChuck

    LeChuck Guest

    Yeah, I've tried that. No all the buttons, but I've tried holding the
    menu button, and I've also tried holding some buttons while pulling the
    TV back in. I'm going to try to do that a few more times and then I
    guess ask a local repair shop if it doesn't work out.

    Thanks.
     
  7. Jamie

    Jamie Guest

    have you tried holding some buttons in while hitting the power switch?
     
  8. Franc Zabkar

    Franc Zabkar Guest

    The service manual for the KS7A chassis is here:
    http://www.eserviceinfo.com/download.php?fileid=15342

    Unfortunately it's not very helpful.

    In the absence of a secret reset key sequence, I'd be attempting to
    reprogram the EEPROM chip (24C16) by hand using the settings in the
    manual, but then I have an EEPROM programmer.

    - Franc Zabkar
     
  9. Franc Zabkar

    Franc Zabkar Guest

    The EEPROM stores all the settings for the TV, including user settings
    such as the tuning voltages for the TV channels, brightness, contrast,
    etc. That said, I don't see a setting for "bus stop" in the service
    manual. In any case, I don't think you can just replace the EEPROM
    with a blank one, assuming that's what you had in mind. Then again,
    maybe the uP contains some default parameters that can bootstrap a
    blank EEPROM ...

    - Franc Zabkar
     
  10. Franc Zabkar

    Franc Zabkar Guest

    That's what I thought. There must be a simple way to recover from this
    scenario otherwise the design is flawed.

    As a technician, I find it annoying that service information is often
    only made available to select service agencies, and not to the wider
    third party service community.

    - Franc Zabkar
     
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