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CRT television powers on but screen is black

Elystone -  
 KOjemenbaslesc -
Hello, I am trying to repair my 14-inch cathode ray tube television. It had a failure due to the amplification transistor mounted on the power supply stage. Once I replaced it, the television emits a constant humming sound but the screen remains off. While checking the circuit, I noticed a blue ceramic capacitor that was burnt. After replacing it, nothing changed regarding the issue. Please help me to repair it.

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2 answers

  1. KOjemenbaslesc
     
    Hi, a humming indicates that the high voltage transformer is burnt out, you probably need to change the entire coil stage on the power transistor and the switching transistor as well.
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  2. Andy31200 Posted messages 26918 Registration date   Status Moderator Last intervention   12 207
     
    Hello,
    Honestly, at the price of flat screens, I don't think it's wise to spend money on this old cathode-ray one

    --
    I call a spade a spade *
         *in French in the text
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    1. KOjemenbaslesc
       
      Hi, there are plenty of reasons that might not resonate with you, for a basic ping pong there's nothing better than a cathode ray screen, or an invaders, no matter the reasons.
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