My tv hums when the backlight is at any setting other than 100 percent. This problem was present when the Tv was first set up.
The product chosen isn't the actual tv that I have, my model number is 42LG30 but this webpage wouldn't let me chose that
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> Could the backlight inverter be the cause of not getting any power?
If the set uses a fluorescent backlight (many use LEDs instead) it will not prevent it from turning on so at least audio should be present.
With no backlight. you will not see any video but the set will receive and audio will work.
If you replaced the (main) power supply with a 'pull' (removed from another set) it may have failed like your original one.
Humming usually begins when the backlight setting is low. For some sets setting the backlight anywhere from 95 to 100 works. Most wok at 100. So turning it up should get rid of the problem. You can follow the 5 steps below to change the backlight setting.
1. Turn the TV on. 2. Press the Menu button on the remote, located right below the channel changing button. 3. Press the down direction button, located at the middle of the remote. Press that button until the backlight is highlighted. 4. Press the right direction button until the backlight is at 100. 5. Press the OK button and then the Exit button until you get back to your picture.
Hello, You most likely have a backlight issue with this TV set. Could be the
inverter circuits for the backlights. The inverter is the power supply
source for the backlights. there could also be a screen driver
problem. This would entail changing the entire board. You should call
in an authorized LG repair center to check this set out for you. Good
Luck and please let me know what you found out about this TV set.
try unplugging any equipment that you have attached to the tv one at a time, such as dvd players, surround sound, cable box, etc. also if you have a cable box attached, try adjusting the volume on it. if you have everything unplugged from tv and it still hums, then it may be a tv issue
Hello Jilinzels the problem with your tv set is not the backlight, this problem is usually caused by the inverter board which supplys the power for the backlight to work,for the backlight to your tv set model # contact philips they have one in stock and ready for shipping, if you would like to take my word click on the link below there is a new inverter board for your tv set,you can change this board out yourself with the instructions that come with the board just be very careful when doing so,hope this helps if you have further questions feel free to ask me thank you.
It could be a few things. The first thing you want to look at is make sure that the microphone is muted in the mixer controls of your audio cards. These settings are located in the control panel. If you need the mic, look under the advanced settings under it and disable the 20 db option for it.
From JD at oncorpus.com [manufacturer of the 32LB30Q]
Please follow these instructions, should fix the hum issue: 1. Turn
tv on 2. Input
mode should be tv 3. Turn
volume to zero 4. With
remote enter 9 8 7 6 5. A
menu will appear on left side 6. Arrow
down to backlight and with right arrow key move number from 81 to 83, press
menu button twice, 7.Turn
up volume and listen if hum is gone.
The TV usually hums when the backlight setting is too low. So turning
it up should get rid of the problem. To do this please follow these
1. Turn the TV on.
2. Press the Menu button on the remote, located right below the channel changing button.
3. Press the down direction button, located at the middle of the remote. Press that button until the backlight is highlighted.
4. Press the right direction button until the backlight is at 100.
5. Press the OK button and then the Exit button until you get back to your picture.
This is probably a defect in the backlight inverter circuit. The transformer may have a loose winding or something in there is not cycling off or on properly. If you can still collect on the warranty, do so.