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LG 47LG50 47 in. LCD HDTV Questions & Answers
I have a 47LG50 tv
Hello,
Common faults are: some buttons not working, not working at all, corroded battery terminals. Often buttons are sticky because of some dirt accumulated over the years from the sticky little hands of your kids?
The hardest part of repair is often to open the covers. You do not need much experience in electronics repair to repair a remote. Also it is perfectly safe as there is no way to get an electric shock as they work with batteries.
step 1Test your remote with Digital Camera
Check your batteries first or buy new batteries. Once you have good batteries, you can test with a digital camera by pushing the buttons and having camera on and pointing to the infrared led. You should see red light if the remote is working. If no light comes up you obviously have a dead remote but do not despair and procede to the next step
step 2Open the remote control but there is a catch or a few catches.
Remove the screws if any. Sometimes screws may be hidden under a sticker or rubber feet. Often there are no screws at all but just plastic catches hidden so you have to be clever to open it without breaking the case. Use something blunt and flat toclick the covers open. This is often a challenge but should not be too difficult.
step 3Take a picture of every phase so you remember how to re-assemble
Since you are using a digital camera you might as well take pictures of the disassembly so re-assemly will be easier.
step 4Pull everything apart
Did you take a picture of the keyppad layout? Sometimes keypad is just one rubber membrane but sometimes the keys fall away like pieces of a Lego puzzle. And if the buttons are marked with numbers and functions you may struggle to re-assemble them in right order? Use a small plastic takeaway box or similar to store the bits so you don't lose parts.
step 5Inspect the circuit board and repair dry joints
Remotes are often dropped on the floor and may develope dry joints on the battery contacts or circuit board. Inspect the contacts and circuit board under good light with a magnifying lense or if lucky you might have a microscope or just a very good eyesight? Solder all suspicious joints. If there is a sign of water damage you can use methylated spirits and toothbrush to...
step 6Wash the covers and the buttons
Use a smal bowl or similar to wash and contain all the parts so you don't lose bits down the drain. Use old toothbrush to clean all button holes and buttons. Warm water with dishwash liquid does the job. Take particular care with those small buttons and clean them properly. If you can leave the bits to soak overnight they come clean easy. Ultrasonic cleaner would be goo...
step 7Rinse, drain and dry the parts
Rinse with warm water. Use a drainer to contain all the parts without losing small bits down the drain. As extra security use sink plug. Dry with a paper towel. Wipe the buttons dry individually as they may still have some dirt which makes them sticky when in use.
step 8Repair case and re-assemble
If there is damage to the case or buttons you need to do the required repairs. Use hot glue or super glue depending on fault. Let dry overnight if you had to glue something. Re-assemble bits in reverse order and make sure you have the buttons in right place and right way around. Small nicks and dents on plastic cover can often be repaired by heating carefully with a h...
step 9Test with Digital Camera
Test every button as before. Sometimes you have to push two remote buttons simultaneously as with recording buttons.
Good luck in solving the problem.....
47LG50 UG flat panel tv
Tries tv unplug,replug it back like about an hour.The tv now,will be resetting itself back to the factory setting.The tv now,should be working right again.Not, if it have the same problems,than the tv Tuner signal board have internal shorting problems.That the board,where the incomming broadcasting signal cable plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish tv Tuner signal board for the replacement.
My 47LG50 is just over 2 years old, about 30 days
This problems it could be those 2 long LCD inverter boards are dead,so it is not giving ur tv LCD screen panel the backlight to produce a picture or the tv Tuner signal board itself is the problems it dead.That the board,that take in the incomming broadcasting signal wire ur case the HDMI or Component cables.Take out the incomming broadcasting signal to the tv,turn on the tv,now tv have no picture,it should have a loud white static picture noises for good more 5-8 mins,than problems it not the tv Tuner signal board.Than it is those 2 long LCD inverter boards are dead.Tries websites like Shopjimmy.com,Ebay.com to buy refurbishes 2 long inverter boards or the tv Tuner signal board for the replacement.
47LG50 channels change themselves
Do a reset to this TV, and then check. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.
TV screen went blank, can it be repaired?
If audio is OK, the problem is with its back-light. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.
Remote not working nor do side buttons respond.
Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
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