What to do if my LG 20LS1R-ZG LCD TV has no raster on AV signal (Component, CVBS, S-VHS)?
If your LG LCD TV displays no raster on AV signal (Component, CVBS, S-VHS), verify the input source cable and jack. Also, check 5V, 33V of TU701, the signal of Change Q113, Q114, Q115, R194, R198, R184 and the input/output of U101 and U301. Re-soldering may be needed.
How to fix an LG LCD TV with no power (LED indicator off)?
If your LG LCD TV has no power and the LED indicator is off, check the short of main B/D. Also, check 15V or 5V, the output of Change Q402 and U406, the LED Assy and J103, J125, J126 Connector. You may need to change Lips of Lips Fail.
Why does my LG 20LS1R-ZG have no sound?
If your LG LCD TV has no sound, first verify that the correct input source is selected. Then, check the speaker and speaker wire. Also, check the input/output of U201 and U301. Consider re-soldering if necessary.
What to do if my LG 20LS1R-ZG has no raster?
If your LG LCD TV shows no raster, start by checking the LED status. After that check panel link, input source cable and jack. Also, check the input/Output of U301, inverter and Change U401~U405, U407, U409.
General| Screen Size | 20 inches |
|---|---|
| Display Technology | LCD |
| Resolution | 640 x 480 |
| Aspect Ratio | 4:3 |
| Refresh Rate | 60 Hz |
| Sound Output | 3W x 2 |
| Inputs | RF |
Provides essential safety notices and general servicing advice.
Details procedures for cold and hot leakage current testing.
Outlines standard practices for safe and effective TV servicing.
Explains techniques to prevent damage to sensitive electronic components.
Guides on proper soldering techniques and tool usage.
Covers methods for replacing ICs, transistors, diodes, fuses, and resistors.
Details techniques for repairing damaged circuit board traces.
Details general TV features and physical dimensions.
Covers electrical parameters and visual performance metrics.
Specifies factory default states and operational parameters.
Guides on video, color, and signal adjustment procedures.
Explains the process for firmware programming using ISP tools.
Lists and describes the functions of the service remote control.
Guides on diagnosing power-related problems and LED status.
Addresses troubleshooting for screen display and lack of raster.
Covers diagnostics for audio problems and signal reception.
Illustrates the TV's functional blocks and their interconnections.
Provides visual assembly breakdown and a list of replacement parts.
Offers comprehensive part numbers and specifications for ordering.
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