Question about Flat Panel Televisions

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Actually it a lnt5271f, but...

I can't get cable TV to work. It shows weak or no signal. OTher TVs in the house work, so it's not the cable.

I can use the DVD and the gane systems, but not the regular TV, an ideas? Bought new 37" Samsung and get weak/no signal for all HD channels. Other HD TV receives excellent reception. Spent all day Sunday redoing cables, connections and eliminating splitters. Even bought amplifier to strengthen signal. All efforts netted same result: one TV very good, Samsung zero. Geek squad to come in two days to check out. This appears to be similar to a modem problem I had a few years ago with a new computer. Jumped through numerous tech support hoops for a week or two before exchanging the computer for a new one that worked right out of the box.

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  • gfx001 Jun 11, 2008

    The problem was the type of Coax cable going to the TV. It was the push on type instead of the screw on type. And that was the totality of the problem. After hours of running new cable, making new ends, sweating in the attick. The entire problem was the cable coming from the wall.

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Your cable line coming to the house may be fine, but each device has a section of cable running to it separately. This will be coming from one or more splitters leading from the main cable. Follow the cable line that leads to your new problematic TV, to verify that both ends of the cable are firmly connected.
If you use a cable box then send the signal to this TV, be sure you have the cable/cables correctly and firmly attached/seated in order to get the full signal strength.
Also make sure that the cable is sound and not damaged or frayed in any way from end to end.

Posted on Jun 09, 2008

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1 Answer

How to tune a tv channel


This could be too much signal.

Just to be sure though, try the set in another room where one of the other TVs works okay. This will help you see if it's a cable or a TV signal issue. If you pick up all the channels okay it's likely that that other TV point has some bigger signal losses due to the cabling.

The mux (transmitter channel) carrying the BBC signals will be amongst the strongest at each and every TV transmitter across the land. This is because the BBC and the main ITV channels have to reach about 96% of the mainland UK population in order to the broadcasters to fulfill their remit.

TV tuner sensitivity varies between brands and models. It may be that your old TV was just about okay with the signal power, but the new TV's tuner is over saturated.

A simple and inexpensive diagnosis tool is a variable attenuator. The MA1620 on this page is perfect for that job:
Splitters amplified splitters and attenuators

It will give you a way to reduce the signal level at one TV without affecting the other TVs in the house.

Sep 06, 2014 | Flat Panel Televisions

1 Answer

37" LG flat screen is


With the onset of more and more TVs being hooked up to cable, TV manufacturers didn't need to make the tuners as sensitive because the signal from the Cable Co. was much stronger than the over the air signal. If the other TVs are older they may be just sensitive enough to lock onto the channel signals. You could ask your cable provider to check your available signal in the house to see if there is the proper amount of signal. Some channels can inherently be stronger and when "block converted" (put where the cable company wants the channels) all come thru but some are a bit clearer.

Aug 28, 2011 | LG 42LG30 42 in. LCD HDTV

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I swiched my sharp from a working Bell PPV satellite signal to a working standardCable Coaxial connetion from Rogers, while my two samsung tvs are working onthe rogers coaxial signal, the Sharp is not...


Good day!!


OK please try to go to the menu using button on your TV...after that find the auto scan mode...

please complete the 100% scan for better results...


if the problem persist try to play DVD or any recorded TV show to determine if the problem is on the signal or on the TV itself (the tuner is weak)..

Jul 10, 2011 | Flat Panel Televisions

2 Answers

I work in a hotel that has all lg lcd tvs. The tvs keep having no HD signals.


my suggestion is to recheck your antenna is pointed right at the transmitter (the usual 2 person job, one looking at the tv the other on the roof/ladder moving the antenna around) or perhaps check the cabling between the antenna and tv including any fly-leads. If all this fails then perhaps a newer antenna/re-cable. I could be wrong, but from your description of the problem its all i can gather.

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3 Answers

Samsung LCD TV ''Weak or No Signal''


try swicth cable box for testing....if sam problem..need replaced tv main board

Jan 01, 2010 | Samsung LN32A330 32 in. LCD TV

2 Answers

The picture seems very coarse and has diamonds running across it


Hello: In standard defintion the picture is showing in 480p which is the lowest resolution for LCD televisions, The picture will only look as good as the signal its getting, If you have cable then it should look some what better even with std defintion. The Diamonds/triangles are caused from a weak digital signal or weak broadcast station. This is a normal occurance for LCD televisions as the picture is put on the screen in blocks. I would not say your television is bad, just a poor or weak signal, If you are using a digital antenna and not cable, then you might try purchasing a signal amplifier to boost the signal before going into the set.

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1 Answer

3 PANASONIC TVS HOOKED UP TO CABLE SYSTEM AND ARE ON 37" PANASONIC TH-37PX50U WORKS FINE BUT THE OTHER 2 TVS DO NOT WORK. THE CABLE SYSTEM HAS BEEN CHECKED TWICE AND WE ARE TOLD IT IS OK BY TIME WARNER...


unhook 1 tv at a time leaving 2 tvs each time hooked up. try every combanation Possable to see if it's a tv problem or if when you have all 3 tvs hooked it makes the signal weak. this can happen cable guys say no but it can been there done that. if 2 works and 1 dont in every combanation the problem is in the cable system. most cable guys check the signal outside. with the splitter block unhooked. this gives a false reading.

Oct 31, 2009 | Panasonic TH-37PX50U 37 in. HD-Ready...

1 Answer

The screen shows ''Weak Signal'' and no picture, even though audio is coming through from both the Cable DVR box and Blue-Ray player. The cable box connects to the TV with an HMI cable - all five TV inputs...


Mine did the same thing once. I think all I did was hit the setup on the remote, and let it run back through all the channels and then it worked just fine.

I hope this works for you.

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2 Answers

No signal on tv


i have 32ins Samsung displaying no satellite signal what is solution?

Aug 15, 2008 | LG Flat Panel Televisions

1 Answer

Actually it a lnt5271f, but...


there is a differnece between other TV's in the house working and the TV at that specific location working. Check the cable splitters which go into that room and tighten the cables at all ends..loose/broken cables cables can result in weak signals. It might be a bad splitter too.

Jan 12, 2008 | Samsung LN-S4092D 40 in. LCD HDTV

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