I have a umc 32inchflat screen and suddenly it has started sticking and we can only get a few channels tryed retuning but still cant get the channels model number 32/188g-gb-513 tcu uk

get the onscreen menu onto the screen scroll to the auto tuning and start
sit back and after a period of time all the available channels will be installed on the TV

It is possible that the cable to your antenna is broken somewhere. You have the right idea to start there.
It is also possible that your TV is looking at CABLE instead of AIR, or visa versa.

If your philips tv keeps losing it's stations when you switch it off, this my be a solution -----my 42" tv would need to be retuned every time I wanted to watch it this fault just started over night it was all working fine then sat down to watch tv and had to retune tv from scratch I could then watch telly all night fine change channels no probs all great switch it off next day retune and so it went on if you have this problem switch telly on then hold in menu button on tv until screen goes black (this reboots software) then retune tv as normal it will ask if you want a full retune (yes) when this is complete digital and analogue your tv should now remember channels when switched off and work as it used to ----( Hope this helps you if you have had this problem it worked for me ). Good Luck

It's October 2012 and I have a problem with my exact same model of JVC TV which has worked fine since i bought it in January. In fact it has worked the best out of the four that we have in the house working off the same aerial until 4 days ago. I tried retuneing and then the problem expanded to more channels. I tried to reset to factory options and then do a retune but lost all the channels. I have again reset and retuned and I'm back with channels that I can only tune into for between 4 and 15 seconds before the screen goes blank. None of the other televisions are affected. Digital UK website show no works to transmitters in our area and JVC are impossible to contact. Their site sends one around in circles in a most frustrating and unhelpful way. I will not be buying JVC again. Any help offered would be gratefully accepted!

To restore missing channels, you need to retune your digital receiver (box or TV).

The retuning process runs a scan and finds all the available channels. Your box may have an Add New Channels option that you can use, but this may not pick up other changes such as channels being moved to a different multiplex or removed altogether.
How to retune

1. Switch on your digital box and/or TV.
2. Press Menu on the remote control.
3. Select the Setup or Installation option.
4. Select the 'First time installation' option (sometimes called 'Factory reset', 'Full retune' or 'Default settings').
5. Press OK if your equipment asks if you want to delete all your channels. Don't worry, this is normal.
6. If you are prompted for a code, try 0000 or 1234.
7. Channels will be automatically installed. This may take a few minutes and your equipment may shut down and restart.
8. After retuning, you will have to redo your Favourites list and other settings. If you retune a digital TV recorder, you also should reset future recordings.

in the manual i noticed a note about the active antenna and it should be showing not active when standard antenna is used.i also tried channel scan instead of first time installation which i tried a few times.so i dont really know which worked,just kept trying.

Try the NICAM/Sound button on the remote and then select the channel search if you get a menu on screen with that option. Hope this helps

It seems others have had this problem too, but there seems to be a generic solution to it. Unplug the device from the mains and leave it without power for a few minutes. Then, reconnect your device. That should solve your problem.

Back to your question about retuning it, you have to hold the channel up and channel down buttons at the same time for a few seconds. Auto-setup should start.

Hope that helps,

Thomas

hi do you mean the colour flashing on the screen, if so it's gone in to screen burn mode try press menu on the remote, retune the tv, if this don't work get back to me with model number of the tv help you a bit more thanks

shaun