Problem with TV

**floop12444** · 01-16-2009, 05:55 PM

I got a new LG TV for christmas, but cannot receive all of the freeview channels. Any one got any help#?

**magnethead** · 01-16-2009, 06:36 PM

what do you mean by freeview? Do you mean OTA analog or OTA digital or both or no?

(OTA = over the air)

DonaldG · 01-17-2009, 01:02 AM

'Freeview' in the UK = Digital channels where no subscriptions are needed.

**floop12444** · 01-17-2009, 02:30 AM

Yes basically digital channels. I cannot get all of them. Its built into my TV but not all of the channels work.

DonaldG · 01-17-2009, 11:05 AM

OK - I guess you are in the UK - it is useful to know at least the country...

First off, have you fully scanned for all channels since installing it on that particular aerial?

Have you upgraded your aerial for digital reception?

It the aerial pointing at the TV transmitter? (If it is slightly off, you could be losing a goodly chunk of signal...

If you are still using an 'old' type aerial, you may not be getting good enough signal for all channels. I suggest that you get it checked by the local aerial fitters who will have a proper signal measuring instrument to optimise the setting of the aerial.

**floop12444** · 01-17-2009, 12:31 PM

Yes i am in the UK :D
And its frustrating because there are many other televisions in the house which can receive all of the digital channels. So surely it cannot be the aerial.
By the way, i have a lot of cable extension lead excess leftover so i have to wrap it in a circle before if actually gets to my tv.
Would this be the problem?

DonaldG · 01-17-2009, 12:50 PM

Quote:

Originally Posted by floop12444

Yes i am in the UK :D
...
By the way, i have a lot of cable extension lead excess leftover so i have to wrap it in a circle before if actually gets to my TV.
Would this be the problem?

That is very possibly the cause. Coiling the coax converts that portion in to an inductor. That, combined with the natural capacitance of the cable makes it a 'tuned circuit'. That can have a very detrimental effect on the amount of signal voltage at the TV end.

The best option is to cut the cable down to ''Just enough' length. Even high quality coax has losses. Bog standard TV coax is not high quality.

If you cannot cut it down, at least uncoil it and meander it back & forth. Never in a coil!!!!

BTW: the best online Freeview TV programmes I have found is at http://www.tvguide.co.uk/. You can customise the listings to just show those in your area and not show the shopping channels or kids programmes....

**floop12444** · 01-17-2009, 01:04 PM

Donald you've been a great help, i will cut it down to size and see if it works. I thought this may be the problem from the start.
Again Thanks.

DonaldG · 01-17-2009, 01:14 PM

Another point - If you have several TVs running off the same aerial, the available signal voltage will be shared with each TV

Let us say that the signal voltage is one millionth of a volt and you put 4 TVs on that aerial. Each TV will only get a quarter of the available signal.

**floop12444** · 01-17-2009, 01:34 PM

Basically we have 4 TV's [One running with a set top box and the other three with digital Built in] Could this be the problem?

**bruiser** · 01-17-2009, 01:59 PM

If you have 4 TVs running off one aerial, that cuts the signal way down, as DG said. You could try a pre-amp, attached to the aerial head, or maybe a distribution amplifier, to boost the signal levels.

**magnethead** · 01-17-2009, 08:38 PM

Quote:

Originally Posted by bruiser

If you have 4 TVs running off one aerial, that cuts the signal way down, as DG said. You could try a pre-amp, attached to the aerial head, or maybe a distribution amplifier, to boost the signal levels.

through trial and error, ive read amplifiers cut out part of the digital signal, but in testing, i havent seen this for sure yet.

**floop12444** · 01-18-2009, 03:05 AM

Well first of all im going to cut down the aerial so it isn't coiled before it gets to my TV.

01-16-2009, 05:55 PM	#1 (permalink)
floop12444 Senior Tech, Games Team Join Date: Jan 2009 Location: England Posts: 924 OS: Windows XP SP3 My System	Problem with TV I got a new LG TV for christmas, but cannot receive all of the freeview channels. Any one got any help#? __________________ Everest Home Edtion ♦ System requirements test ♦ Nvidia Drivers ♦ ATI Drivers ♦ Revo Uninstaller ♦ GPUz Forum Rules Steps Before Posting

01-16-2009, 06:36 PM	#2 (permalink)
magnethead Registered User Join Date: Mar 2006 Location: Texas, USA Posts: 3,568 OS: Vista ultimate 32bit My System Blog Entries: 3	Re: Problem with TV what do you mean by freeview? Do you mean OTA analog or OTA digital or both or no? (OTA = over the air) __________________ For proper support: what are you running? graphics, cpu, m/board, ram, PSU brand wattage PCI-E requires 26 amps at 12 volts. That's a 650W PSU. Power Supply Info and Selection . Info on thermal compounds & application . TEST PSU USING MULTI-METER . Bench Testing Your System

01-17-2009, 01:02 AM	#3 (permalink)
DonaldG Manager Home Support, Assistant Manager Articles Team Join Date: Aug 2007 Location: Somerset, UK Posts: 10,056 OS: XPsp2 Laptop & Vista Ultimate Desktop My System Blog Entries: 1	Re: Problem with TV 'Freeview' in the UK = Digital channels where no subscriptions are needed. __________________ . Lest we forget... "They shall grow not old, as we that are left grow old; Age shall not weary them, nor the years condemn. At the going down of the sun and in the morning We will remember them." Submit New Articles Here TSF's Photographer's Corner .

01-17-2009, 02:30 AM	#4 (permalink)
floop12444 Senior Tech, Games Team Join Date: Jan 2009 Location: England Posts: 924 OS: Windows XP SP3 My System	Re: Problem with TV Yes basically digital channels. I cannot get all of them. Its built into my TV but not all of the channels work. __________________ Everest Home Edtion ♦ System requirements test ♦ Nvidia Drivers ♦ ATI Drivers ♦ Revo Uninstaller ♦ GPUz Forum Rules Steps Before Posting

01-17-2009, 11:05 AM	#5 (permalink)
DonaldG Manager Home Support, Assistant Manager Articles Team Join Date: Aug 2007 Location: Somerset, UK Posts: 10,056 OS: XPsp2 Laptop & Vista Ultimate Desktop My System Blog Entries: 1	Re: Problem with TV OK - I guess you are in the UK - it is useful to know at least the country... First off, have you fully scanned for all channels since installing it on that particular aerial? Have you upgraded your aerial for digital reception? It the aerial pointing at the TV transmitter? (If it is slightly off, you could be losing a goodly chunk of signal... If you are still using an 'old' type aerial, you may not be getting good enough signal for all channels. I suggest that you get it checked by the local aerial fitters who will have a proper signal measuring instrument to optimise the setting of the aerial. __________________ . Lest we forget... "They shall grow not old, as we that are left grow old; Age shall not weary them, nor the years condemn. At the going down of the sun and in the morning We will remember them." Submit New Articles Here TSF's Photographer's Corner .

01-17-2009, 12:31 PM	#6 (permalink)
floop12444 Senior Tech, Games Team Join Date: Jan 2009 Location: England Posts: 924 OS: Windows XP SP3 My System	Re: Problem with TV Yes i am in the UK :D And its frustrating because there are many other televisions in the house which can receive all of the digital channels. So surely it cannot be the aerial. By the way, i have a lot of cable extension lead excess leftover so i have to wrap it in a circle before if actually gets to my tv. Would this be the problem? __________________ Everest Home Edtion ♦ System requirements test ♦ Nvidia Drivers ♦ ATI Drivers ♦ Revo Uninstaller ♦ GPUz Forum Rules Steps Before Posting

01-17-2009, 01:04 PM	#8 (permalink)
floop12444 Senior Tech, Games Team Join Date: Jan 2009 Location: England Posts: 924 OS: Windows XP SP3 My System	Re: Problem with TV Donald you've been a great help, i will cut it down to size and see if it works. I thought this may be the problem from the start. Again Thanks. __________________ Everest Home Edtion ♦ System requirements test ♦ Nvidia Drivers ♦ ATI Drivers ♦ Revo Uninstaller ♦ GPUz Forum Rules Steps Before Posting

01-17-2009, 01:14 PM	#9 (permalink)
DonaldG Manager Home Support, Assistant Manager Articles Team Join Date: Aug 2007 Location: Somerset, UK Posts: 10,056 OS: XPsp2 Laptop & Vista Ultimate Desktop My System Blog Entries: 1	Re: Problem with TV Another point - If you have several TVs running off the same aerial, the available signal voltage will be shared with each TV Let us say that the signal voltage is one millionth of a volt and you put 4 TVs on that aerial. Each TV will only get a quarter of the available signal. __________________ . Lest we forget... "They shall grow not old, as we that are left grow old; Age shall not weary them, nor the years condemn. At the going down of the sun and in the morning We will remember them." Submit New Articles Here TSF's Photographer's Corner .

01-17-2009, 01:34 PM	#10 (permalink)
floop12444 Senior Tech, Games Team Join Date: Jan 2009 Location: England Posts: 924 OS: Windows XP SP3 My System	Re: Problem with TV Basically we have 4 TV's [One running with a set top box and the other three with digital Built in] Could this be the problem? __________________ Everest Home Edtion ♦ System requirements test ♦ Nvidia Drivers ♦ ATI Drivers ♦ Revo Uninstaller ♦ GPUz Forum Rules Steps Before Posting

01-17-2009, 01:59 PM	#11 (permalink)
bruiser TSF Enthusiast Join Date: Jul 2005 Posts: 1,965 OS: xp	Re: Problem with TV If you have 4 TVs running off one aerial, that cuts the signal way down, as DG said. You could try a pre-amp, attached to the aerial head, or maybe a distribution amplifier, to boost the signal levels.

01-18-2009, 03:05 AM	#13 (permalink)
floop12444 Senior Tech, Games Team Join Date: Jan 2009 Location: England Posts: 924 OS: Windows XP SP3 My System	Re: Problem with TV Well first of all im going to cut down the aerial so it isn't coiled before it gets to my TV. __________________ Everest Home Edtion ♦ System requirements test ♦ Nvidia Drivers ♦ ATI Drivers ♦ Revo Uninstaller ♦ GPUz Forum Rules Steps Before Posting