20 Most Recent LG 37LH30 37 in. LCD HDTV Questions & Answers

try a different HDMI input

Some TV's & cables are not HDCP compliant . Sometimes you can replace the cable to fix the problem & other times you have to replace the tv because its not HDCP compliant . First check to see if your tv is HDCP compliant .

Do an internet search for lg power supply for LG37H30 replace the entire power supply! (because the damage may have caused other bad coponents do to that one ic exploding avoid a headache replace the entire power supply and start watching TV again.

Since you mentioned that the fault disappears after few minutes , it seems realtive to a weak component and in all probability it can be a weak electrolytic capacitor. Since you have narrowed the search it becomes still easier to confirm the suspect. So switch on an using a hair dryer gently heat the board which is suspected. If the fault clears, you must cool the board, the use of a FREEZE-IT spray will help to cool the components. Now repeat with specific components or even use a soldering iron on the top of the components so as to heat them individually. If the band clears then the component is confirmed . take time and be extremely careful not to short any component or circuit.

It can be power supply due to bad caps, but we need to find out first if the backlights are on but no pictures, or no backlights at all.
Service manual: http://elektrotanya.com/?q=showresult&megnev=LG&megnev2=37LH30&kategoria=tv&kat2=all

Please try this when the pictures go out:
First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board. if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having. If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on: Basic LCD monitor and TV troubleshooting guide: http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting http://www.fixya.com/support/r7406380-tv_training_manuals Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague Parts: www.shopjimmy.com Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps. Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series. Please post back what you find

24vdc power supply problem due to bad caps, shorts circuits in the backlight inverter board, bad T-CON board, bad main board.
First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board. if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having. If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on: Please see my basic troubleshooting guide here: http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums http://en.wikipedia.org/wiki/Capacitor_plague Parts: www.shopjimmy.com Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps. Please post back what you find.

Using the yellow, white and red audio/video cables connect to the side panel of your LG TV and switch the Wii console on. Then press input button on remote and select AV 3 then OK and you should see Wii Menu.

can get remote to controk all of my lg37lh3000 but not the volume have tried codes 2210, 1293, 1176 and a few others any ideas please, jan

It sounds like you are in Closed Captioning 2 mode. Check your setup menu. Turn off or choose mode 1

Have you completed the entire auto programming?This can take up to 30 minutes and if you don't complete it you won' get any digital channels.If you have done this then you need a new main signal board.Call lg and they will refer you to the nearest service center.

All the new tv's with a digital tuner have to be programmed before you will get a picture unless using a video input for viewing.

Clean the Lens: Use a DVD cleaning disc to clean the lens. If the problem persists, consider professional cleaning. Test Other Discs: Try playing different DVDs to see if the issue occurs consistently. If it's specific to one disc, that disc might be the problem. Check for Updates: Make sure your DVD player's firmware is updated. Refer to the manufacturer's instructions for firmware updates. Try a Different TV: Connect your DVD player to a different TV to see if the noise disappears. If it does, the issue might be with your TV. The hum is simply the player trying to read the disc. It can't so, it spits it out. Remember that prolonged use of a malfunctioning DVD player could potentially cause damage. If the problem persists, consider seeking professional repair or replacement