Sony FD Trinitron KV-28FQ75 28" TV Logo
GAIL KAVANAGH Posted on Aug 01, 2006
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Sony kd28dx40u After about half hour of my tv being on, my tv makes a cracking sound so bad that you can't hear the people on tv speaking. After switching tv off for a while then putting it back on it is ok for a while then it starts cracking again. What could be wrong with my tv as it is only three years old.

  • kjrossignol Dec 31, 2008

    I just bought a new HDTV. It is making a cracking sound. I had an electrican look at my wiring and there is no problem there. He then suggested I get a new cable box, which I have now replaced and still the TV makes a cracking noise every so often. Any suggestions? Could it be a fault with the TV or possible the cable line coming into my house? Also, 6 mths ago I had an older analog TV that made the same sound and I sold it at a yard sale thinking their was something wrong with the TV.

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  • Expert 275 Answers
  • Posted on Aug 02, 2006
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It seems that there is EHT Leakage from the EHT Transformer Anode Cap! Generally happens during rainy seasons, or if your TV is placed near a window or near an AC, due to excess of moisture in the air. Unplug the TV and wait for an hour to discharge all residual charge in Capacitors. Open the back, and look for a thick red cable leading from the FBT. (It is a Black Block with a thick red cable running from it to the rear of the Picture Tube). Take a sturdy Electrical cable with the conductor visible at both ends. (Multimeter Leads will do.) Now, ground one end of this lead to any Metal part of the Chassis, and gently ease the other end under the Cap of the EHT Cable. BE VERY CAREFUL, as there are very High Voltages involved! Do it Gently, and you will hear a POP! This indicates that the Electrical Charge inside tha Picture has been discharged. Now Take dry cloth and wipe clean the area around the Anode Cap. Close the back of the TV, and switch it ON. In all likelihood your problem should be resolved. BUT, I REPEAT, DO NOT DO THIS UNLESS YOU KNOW WHAT YOU ARE DOING, AND ARE VERY VERY CAREFUL. Otherwise, seek professional help!

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