Question about LG 42LC2D 42 in. LCD HDTV

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Lg lcd i have a 21 in lcd model rz-20la70 that when it is turned on the screen will flash up for a few seconds then gos off just leaveing sound

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This will be a problem with the inverter board to control the backlights, this causes the screen to try & light up & then blank out. If the backlights are faulty, then a new replacement screen is required. Look for any sign of any component stress on the inverter board & also check for any related capacitors on the power board side that may look swollen & replace them.

Posted on Sep 03, 2009

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Posted on Jan 02, 2017

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Power up problems


It sounds like the power is pulsing - that would explain your speakers. Speakers wouldn't make that sound if they were getting power at a steady rate. Look for a bad capacitor. It's possible you have one or more capacitors that have gone bad. They charge to a certain point, then somehow complete a circut momentarily and discharge, giving a pulsing flow of electricity. You can look for visible signs (leaking capacitors, or capacitors that are leaning over), or you can just start testing them with a voltmeter. If you find a bad one, you'll have to get a replacement and solder it in place.

Aug 06, 2007 | LG RZ-20LA70 20 in. LCD Television

1 Answer

How do I retune LG-RZ-20LA70 20


Check this link to download the user manual to your set. It has all details.

Nov 12, 2012 | LG RZ-20LA70 20 in. LCD Television

1 Answer

LG RZ 20LA90standby light flashes from red to green


Hi, this description usually indicates power supply failure, you can verify this by checking the output voltage of power supply. Cause of the error can be electrolyte capacitors. You can identify them by swelling at the top of the condenser. If you have the technical ability? so there are a few more options for testing. In any case always possible to replace all power supply. Good luck! Let me know if everything worked out, or if you need further guidanc

Feb 28, 2011 | LG RZ-20LA70 20 in. LCD Television

1 Answer

Is this tv digital i have lost remote can i abtain new one


This particular model has a PAL and SECAM tuner built in to the unit, although it does not have a Digital Receiver.

You can purchase a replacement remote control for this item on Amazon.

Just type in LG RZ-20LA70 in the Amazon search engine.

Aug 14, 2010 | LG RZ-20LA70 20 in. LCD Television

1 Answer

No picture, no sound on a LG LCD tv


If it is hot were you live , That model of t.v doesn't like heat, anything about 35 degrees celsius could cause a problem with the card components.

Jul 27, 2009 | LG RZ-20LA70 20 in. LCD Television

1 Answer

Need Owner's Manual for LG RZ-20LA70.


You may have given up or found a solution by now, but I was looking for the same thing today so here's a link to the LG site:-

http://uk.lge.com/support/download_manual.jsp

Hope it's what you're looking for, I've saved a copy if you have any problems just email me

Sep 19, 2008 | LG RZ-20LA70 20 in. LCD Television

1 Answer

LG RZ-20LA70 How do you....


I'm trying to plug in a RZ-20LA70 TV into a Sony DVP NS29 DVD player? Which wires (red, blue, green) go into the coaxial, audio L, audio R, video slots? Thanks, Simon

Jan 14, 2008 | LG RZ-20LA70 20 in. LCD Television

1 Answer

LCD LG RZ-20LA70 20 stopped working


Same problem with our LG LCD. Just thrown away, never a LG again.

Jan 04, 2008 | LG RZ-20LA70 20 in. LCD Television

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