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No sound when turned on

I have had this handheld CB radio for about 3 years, it hasn't been used for a year and after turning it on nothing happened. I replaced the batteries and am now able to turn it on as it makes a "beep" noise as it is turned on and the screen lights up. But there is no sound, the screen remains on. Has anyone else had this issue? or any ideas on how to fix it? The Model number is UH720SX.

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  • Uniden Master
  • 3,287 Answers

The manual may be viewed here.

Have a look at the video below for a quick rundown of features and use.
If you're in the US, this is NOT a "CB" radio. It is a UHF radio operating between 476.425 Mhz and 477.400 Mhz that seems to be popular in Australia. Transmitting on this radio in the US and quite possibly a number of other countries, too) will result in violation of FCC rules & other laws; as the frequencies it works on are not available for the general public. You will likely be interfering with other users / agencies that have paid large sums of money for licenses to use these frequencies.

Check with your country's communications laws before attempting to transmit - even if in Australia - as there may be laws governing their use there, too.

I hope this helps & good luck!

Posted on Jan 22, 2013

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SOURCE: Cobra Cb handheld radio model: HH-35 doesn't work

Open up the back of the radio and check the solder joint from the antenna connector. I had same problem and it was this.

Posted on May 17, 2009

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SOURCE: Cobra 18 wx st cb problem

check the swr on the antenna, if you have the wrong antenna, it wont work

Posted on Oct 24, 2009

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Facts about Cb radio.


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