Broken noname set top box

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  • rauno45
    Member
    • Jan 2013
    • 48
    • Estonia
    #1

    Broken noname set top box

    So i have this set top box that has no name or branding or anything and it does not work. If plugged in and switched on the LED lights green. Then the TV detects input and shows a black screen. Thats all. Will not turn off, not reacting to anything. I have tryed the hairdryer trick to see if maybe some of the capacitors have high ESR , but it did not work. Maybe the problem is in the software that is loaded on there and has crashed, not the hardware? Your opinions? Worth restoring or for spare parts? I have attatched pictures below.
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    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 30931
      • Albion
      #2
      Re: Broken noname set top box

      all you can really do is check voltages on the regulators or the ram chip.

      nice collection of car stereo's btw.

        Comment

        • rauno45
          Member
          • Jan 2013
          • 48
          • Estonia
          #3
          Re: Broken noname set top box

          Got some time to test the thing a little more. Didn´t bother to check the ram chip. If its broken it will be less problematic to buy a new set top box. However one of the voltage regulators(next to heatsink) has low input voltage, that is lower than the other same mark regulators have on the board.(too lazy to find datasheet) Otherwise the regulator seems to work fine tough and i am guessing the input voltage is what is causing this junk to malfunction.

            Comment

            • stj
              Great Sage 齊天大聖
              • Dec 2009
              • 30931
              • Albion
              #4
              Re: Broken noname set top box

              when i mentioned the ram, i just meant it's a good place to meter the 3.3v - if it's using 3.3

                Comment

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