TV will go off and on at different times (sound is OK). Switching on and off has no affect.
Tried to put a fan to cool the board, seem to help for a while but it was apparently was not affecting it like I thought. Pulled board out but saw no heat build up.
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Re: CRT goes black
Randomly spraying Freeze Spray inside the set usually will not help you fix your set. You need to have a little more organized and scientific troubleshooting routine. Get out your DMM and measure the voltages in the power supply. When the screen goes black, is there still regulated B+ going to the circuitry? Do you still have HV? Is the filament of the CRT lit?
Does the set still have a raster (you may have temporarily increase the screen setting to see it)? Do you measure any of the flyback derived B+ voltages that go to the video processing, tuner, Vertical Deflection, and other circuitry?
Be very careful when poking around inside the elevision........there are dangerous and lethal shock hazards inside.........even when the set is unplugged!
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Check its solder terminal at the CRT board [Filament voltage]. It sounds like the filament do not glow after some time due to a loose contact at the CRT base connector sockets. Check it. http://electronicshelponline.blogspot.com/ If this does not help, check the ABL circuit for any open resistor.
Hey If you have tried Using remote and side pannels Have you tried another TV to see if its the Cable? Also The clicking sound is normal its the TV's Power-source starting. The fan light I am not sure of but if it happens every-time it should be normal. If the screen gets warm Instantly (Hotish) Then you TV is dead D:
It might also be a bad solder connection, short of checking voltages what I have done in this type of situation is with back off use a small fairly high speed fan - a hair dryer set to cool works, to cool areas of the boards inside to localize which board is causing this, with the set in failure, got it? it goes out cool it with a handheld hair dryer with air set to cool, when you find the spot where the problem is it will either instantly come back or try to.
Do it a few times to confirm which board is bad and locate a replacement board and swap it out.
U have tools like a soldering iron,a roll solders,also can u do basic soldering?Yes.This tv have cold solders joints in the(CRT-Tv tube) video board connections pins socket that connected to the(CRT-Tv tube).The tv loud buzzing sound is comming from the FBT-the flyback transformer,that is a big black block of plastic with a red wire with a cap that hook to the(CRT-Tv tube).Resolders both the FBT and the video board CRT socket holes connections.Will solved these 2 problems.
found the problem i turnt the tv on and once the fault appeard i used a freezer spray on the chips it turnt out to be the main chip . i then put some heat sink paste on it and took a hink sink and fan off a comp graphics card and fixed that to it to help keep it cool but going to get a new board as i know this was only a temp fix ( new board £59.00 )
MOST LG PROBLEMS HAVE NOTHING TO DO WITH THE INVERTER BOARD AND THE INVERTER BOARD WILL NOT CAUSE THE PICTURE T FREEZE. THE 2 MOST COMMON PROBLEMS ARE THE POWER SUPPLY BOARD ( DEFECTIVE CAPACITORS) AND THE MAIN TOTAL ASSY. THE DESCRIBED PROBLEM ABOVE OF PUTTING A FAN ON THE UNIT IS A TEMPORARY FIX. REPLACE THE MAIN TOTAL ASSY.
I have a similar issue. Sometimes the entire screen goes black and sometimes only one-half - either the top or bottom half goes black. The only solution we have found is to gently tap the TV (usually the front side) and the picture will come back for awhile. It almost seems heat related as it only goes out after the first 10 minutes of use. There must be a fix to this.
Sounds to me like your internal cooling fans are not working. Try placing a fan behind your tv and seeing if it stays on longer. If it does then you'll know it's a problem with these fans. Not expensive to fix but not easy to do either.
My LG 32lc7d 32 inch TV is 9 months old (December 2007 to September 2008) and now the screen goes black with sound and the channels will change I can hear them. Also when the TV is fine if I touch the remote it freezes the picture, so turn it off and on witch does not respond to the remote for five seconds, turn it on again & it works for 2 to 3 hours then same problem. LG claim its a software problem, well I got link to the firmware update down load to my memory stick and stuck it in the usb port on the back of the TV, software update fine no problem, TV reset all my preference are lost no problem I can set it how I like it ,but now worst things are happening the screen goes black after 15 to 20 minutes and no sound now ,so the firmware did not work but cased more problems and less viewing time .NNNOOO more LG product for me in life again .
I bought the TV for $1000 us and the DVD up converting player for $110 + sound system
So I could 1 remote to make life easer for me, but life is better for LG now since they have my money and all I have are their problems.
We should come together and attack LG about this problem or boycott them and their products for good, hundreds of thousands of people have this problem and nothing.
What’s the sense of a warranty if there no fix for your problems and you can’t get your money back. I have bought so many LG products and now no fix. There are millions of people who don’t have a $1000 us in there bank account.. I now feel like I was held at gun point and robbed by millionaire.