Question about Akai LCT2701AD Television

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Humm coming from speakers - can't get cable to work

I just purchased a used Akai 27" LCD HDTV Model # LCT701. Now that it is powered up, there is a hum coming from the speakers. I know it is from the speakers because it goes away when I use the mute, and when I wiggle the cable connection I can hear the hum change, as if it is coming in with the cable signal.and it goes away completely when I disconnect the cable as if it is some sort of misread signal.

Also, I screwed the coax cable into the only screw jack on the back, labeld "rf input" but for some reason am not able to get more than one channel. when I choose sources and roll through the sources with the remote, most show "no signal", except for the DVD. here is a list of the screen shots and what they say.

VGA - blue screen - text reads - main no signal
AV - blue screen - text reads - Main no signal
S- video - blue screen text reads - main no signal
Component - blue screen - text reads - main no signal
Channel 5 - Dr. Phil followed by Oprah

HELP! :D

I am wondering if I am plugged into the right port and also if I need a filter to stop the buzz? Maybe I'm plugged into the wrong place and the signal is being misinterpreted as noise?

Thanks in advance for any ideas.

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  • Curtis336 Jan 31, 2008

    Thanks for the response, but channel five is the only channel that I get. And when I try to change it, it goes to a gray/black screen, sits there a few seconds, then goes back to channel five. I've tried doing a channel search and it searches, but doesn't add any channels.

    The hum is constant, and it starts as soon as the cable housing makes contact to the metal of the rf in. I've touched it to the audio out and it makes the same noise. When I plug the cable back into my other television however it works fine, no hum.

  • Curtis336 Feb 01, 2008

    Ok.. Maybe I figured out the problem? This is an HDTV, and I have what I think is standard cable. Could this be the problem? DO you need HDTV service to feed an HDTV? It's as if the TV doesn't read the signal at all, although all the other inputs that I tested seem to work fine including the built in DVD player. The only problem is with the cable input. No channels, and an annoying, ever present hum.

    The only other thought is some sort of grounding incompatability between the cable and the set.

    Any thoughts?

    Thanks in advance.

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The RF input is the correct one for a cable signal. The other sources use the RCA and other ports which you can connect to other devices, like DVD or VCR players.

If the humm noise only happens when you're on the TV channel then it's likely just the station. Try changing the channel and see if that helps, and make sure the coax is screwed in all the way. Also make sure the other end, if connected to a VCR or other stuff, is tightly attached. If you share cable with many other people and the signal has snow (white spots on the TV), then you may need to buy an RF signal amplifier to reduce the noise.

Source changes the input (RCA versus coaxial versus component inputs), change the channel for different channels..

Posted on Jan 31, 2008

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