Lg tv ct -29q47e out of focus and no picture on all av inputs

change CRT base and reconnect focus wire after cutting away half cm of the wire-end

try checking the tv/av tact switch,if it is grounded or normally close or has a resistance with pressing, replace it with a new tact switch..

hi,
You have to check the picture tube base socket. After some years of use the contacts of the base socket will become bad (normally the screen pin and focus pin). Just replace the CRT socket it will solve your problem. You can find the CRT base socket on circut board at the end of picture tube neck. Pull the circuit board straight to back,do not shack. It will damge the picture tube pins.And replace the socket with the same type. You will get it from any of the electronic spare part shop near to you. Remember one thing remove the socket from the circuit and keep it with you as sample when you are going to purchase a new one, Because there are different types of CRT sockets are avilable. Purchase one which is similar.
ok

Hello
Its picture tube base socket has damaged. Picture tube base socket is one diretly soldered to the base card, which in turn pluged onto the picture tube neck. Its focus control pin will usually get damaged, and this type of fault you describes here will occur. The time taken to clear up picture will vary according to atmosphereic humidty.
You can replace the base card. Unplug the base card from the picture tube base card [do it ver cauciously; not to shake it sideways or up-down - just pull it straight backwards; you may have to apply a little pressure to detach it from the picture tube neck]; resolder it out from the card and go for a new one. Replacing it will solve your TVs problem. OK.

Resolders the FBT-(flyback tranformer).Resolders the video board connections sockets holes,that the board connected to the CRT-(tv tube).Plug in the tv,to have power to the tv,take out the tv video board,for exposer of the CRT-(tv tube).Take an electrical wire with a good insalation in it,grounded to the tv steel frame some where.Take the other end of the wire go toward the open high voltage CRT-(tv tube).U will hear a pop sound,than ur tv CRT-(tv tube) is a 100% clean out of contaminations or u will hear a deeing sounds only,mean the tv CRT-(tv tube) it is to old to pop anymore,just let tv deeing sounds going on for like about 20 mins to rejuvenated the old CRT-(tv tube).After this repluging the tv video board for a tv signal and readjust the button on the FBT-(flyback tranformer) that said focus to fix the CRT-(tv tube) focus problems.

Hello
Picture tubes are available at electronic spare part shops. You have to give them the number and type of the picture tube, to which your JVC TV has. Picture tube, along with its Yoke fittings are integrated, and you can replace it by yoursef at home. Be very carfull in handling the picture tube, as they are highly vacumed, and will explde by hard hits. There will be four seating screws on the four corners of the picture tube, and these slots will clearly alaign if the picture tube selected is orginal number. Diamentions of these holes will be different to spherical and flat picture tubes. So you must first aware of the type of picture tube, which the TV has fitted earlier. OK.

The tv CRT( picture tube) have a radiaton posion infected in ur tv picture tube.This is how u discharge the CRT(picture tube) get the posion out.Take the tv back cover off.Take video board that connected to the CRT(picture tube) out.Plug it in,so u have a live current to the CRT(picture tube).Find a wire like an AV cable,should be find.One side of the metal,grounded to the metal frame somewhere.Take a long needle plier grab the other side of the AV cable wire,not the metal,(Caution high voltage live current).Come very close to the open CRT(picture tube).U will have a live current arc,than u,will hear a big "POP".U,just discharge the CRT(picture tube).The tv now the CRT(picture tube),now it good,it clear of posion infected in ur tv picture tube.Now,unplug ur tv.Put ur tv,back together.Hook up ur tv signal cable and plug in ur tv,now ur tv picture,will be clear,completely.I do this many times to dicharge fuzzy CRT(picture tube).When i was a tv Tech.for the SONY TV Corporation.

[1] change CRT base socket with New.
[2] set Focus preeset to seting focus adjest but she is Dengerus becous inside tv very high voltage in on coundition so Seting with nr. thech.
[3] your tv set is sum 5 to 10 year old if posibul your tv tube is week.but "don' t vary" "recharge tube cathod " and posibbal tube is ok .
if not
then
Replace tube with New.
" do not repar or replace spare in tv it your self .

TRY TUNER ASSEMBLY SOLDER JOINTS COULD BE DRY OR CRACKS GOOD LUCK

It's good that you know how TV's can bite, I'll still have to post this in case someone having your problem and reading isn't aware of this and feels lucky- If still under warranty or if you have no electronic repair experience you should take the set back to the shop or to a repair person. Some of the solutions described below can be dangerous, TV's are very hazardous to service. Even when plugged out, TV's can store very high voltages. could be a problem with the screen potentiometers block. should be located on the chassis close to where the HT lead passes on its way to the picture tube. Good luck