LG 42LG30 42 in. LCD HDTV - Page 4 - Answered Questions & Fixed issues

Hello
The power supply board [SMPS board] of your tV is faulty. Normally, nor repair to this board is intented, or should be done. This board should be replaced as card basis. Plasma TV's panels are very sensitve to static or over voltages. So it will be best to replace this board, rather than maing "surgery' to it. In most cases, the components in this board will be very difficult to get from open market. Frome your description, the SMPS transformer on this board is faulty. You can't get it seperately. Just repace the power supply card. The picture of the card is atteced here. Two snaps of different angle is shown for your reference. OK.

Hi, Check the plug that it is in properly and that there is power at the plug. If all is good go to repair man. Also replace battery in remote. Good luck.

The Pixel of the Laptop Monitor is different from that of the TV.So try to adjust it from Desktop Properties >>> Setting or you can make some adjustment from the TV.Thanks for visiting fixya

Here is a link where you can purchase a remote for this model. Make sure you verify the full model number IE:42LG30 or 42LG30UD

http://www.remotes.com/remotes/servlet/rs?a=Search&o=c&uid=0&m=42LG30&uuid=13117240981180

If you are connected directly to cable TV without a cable box or an external TV antenna, go into the menu system and let the TV autoprogram the channels. It might take quite some time especially if your TV has a digital tuner in it. I hope that helps : )

User manual: http://www.retrevo.com/support/LG-42LG30-TVs-manual/id/15220dj498/t/2/

http://www.fixya.com/support/r4873371-fixing_out_range_format_not_supported

See page 38~40 for what the TV can do when it is used for PC display.
From user manual:

37/42/47/52LG50, 32/37/42/47/52LG60,

32/42/47/52LG70, 42/47LGX, 47LG90,

50/60PG60, 50/60PG70: To get the the best

picture quality, adjust the PC graphics card to
1920x1080.

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 pictures: 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.

Possible that the main power has failed which is a SMPS unit. So remove power cord and open set to probe within the power supply unit.
Click on the link below:

http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

The CCFL (Cold Cathode Fluroscent Lamp) at the darker end is not lit. Either the CCFL is fused or the ballast is needing repairs.

sonsunny

If the TV is completely DEAD. Check the main fuse in the power supply. Replace the fuse with exact amperage. Make sure you unplug the TV before taking the cover off. If the power supply keeps blowing the fuse, replace the power supply. Be very careful high voltage can kill!

Best of luck
AAA TV SERVICE

Hi,

Problem is in either power supply or the Y-Sustain board.

The Y-Sustain is a relatively large board out of which go connections to the side of the display; it's therefore closer to either the left or the right side of the display, has at least one rather large heat sink on it and fat power cables connecting it to the main power supply.

Often there are fuses on that board - one or more. Check those.

if they are blown you can try to replace them, but expect them to blow again - usually the whole board needs to be replaced.

I hope this will help in solving the problem....

Hi If you open up your TV. BE very carefull these TV's have high voltage make sure everything is unpluged for a few hours before touching anything inside. Inside you will find a main unit the HDMI input is on this main unit. You can get a part number from this part and do a search on this website for it www.interliquidparts.com it will cost you under $100.00

Sounds like a backlight is out. If its still under warranty, exchange it. First try unplugging it for two minutes to reset the t.v.

The tv power supply board it is the causes and the problems.That the board where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish power supply board for the replacement.

Here ya go!http://www.ehow.com/how_4925498_remove-lg-flat-screen-stand.html

If your TV is still under warranty I would recommend sending it in. It sounds like the receiver on the TV is malfunctioning which isn't something that can generally be fixed or replaced by your local electronics store. Your best course of action would be to send the TV back to the manufacturer with a detailed list of what is happening. Most major retail outlets can assist you in getting your TV fixed or replaced through the manufacturer if you purchased the TV through them.

It might be on a zoom mode. There should be a option on your remote to change the aspect radio.

Hello
The fault is due to its horizontal sync-seperator and horizontal phase detector section, and it is not user servicable. If you want to do it by yoursef, you must have thorugh knoledge in both digital and analogue electroncis, and a high quality digital multimeter to access these sections. A multimeter of the above said type will cost a lot, that it will be a great loos for you to muy such one, more that its service cost. Moreover, you must have a good concept of solering, a sodering iron with ceramic tip, a very steady and stable hand, more patience and concentration, A magnifying glass may also needed.
In my opinion, it will be best for you to get it repaired by a well experienced service technican, who have most modern testing equipments. Otherwise, things will go worse than present as it is. OK.

immediately open your back cover and check the capacitors. The capacitors may be damadge or some connectors may be lose.

Hi,
What is correct model number of tv, question shows 42LG30 and 42LG3000 and let me know origin of tv (I mean country name) to find out T-Con board, apparently it is T-Con board problem.
Thanks.

Hi, the appearance of black streaks on the screen of a Sharp LCD TV is common problem most customers will have to contend with. One of the most visible signs is the appearance of a message that reads " loss of sync". In this situation, the individual will still hear the sound coming from the LCD TV but the picture disappears especially within 10 minutes of putting on the TV. In some other cases, small horizontal lines may develop on the LCD screen especially when an object is thrown at the screen -the horizontal lines develop at the spot where the object hits the screen, and these lines are often visible when the TV is turned on and such problem is characterized by Grey color screen with no pictures.

Another common situation is the appearance of vertical red line across the LCD TV screen. In this case, the connection from the internal ribbon connector and the display has been effected. This problem may degenerate into the formation of two screens which are separated by a black line .

LG TV screen repair for Black streaks on screen

The best possible LG TV screen repair for vertical lines on your LCD screen is the replacement of the screen itself. It would be ideal for you to know the warranty status of your LCD TV before returning it to the manufacturer. In the case of the formation of black streaks on the LCD screen, a possible reason is that one of the substrates in the screen has been fractured or it can be a result of the release of some bubbles within the screen, especially after the screen was hit by an object. You don't have to think much about this problem, as it should be in your best interest to get a LCD TV repair service to replace the screen for you.
In some other cases, some other components of your LCD TV screen might have been broken down { hardware problems} resulting in black streaks or the formation of Grey or black color on your screen, you will need to get your LCD TV screen undergo some diagnostic procedures before the problem is fixed. This will help you avoid future re-occurrence of the problem.

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