LG 20LS3R-TA Service Manual page 17

4. No Raster on HDMI Signal
Repeat [A, B]
process.
Pass
Check the input/
output of IC101.
Pass
Check input source cable and jack.
5. No Raster on AV Signal(Scart)
Pass
Repeat [A, B]
process.
Pass
Check input/ output
of JA700(L704).
Pass
Check input/
output of IC101
Pass
Check input source cable and jack.
Fail
Re-soldering or change the defect part.
Check X100.
6. No Raster on TV(RF) Signal
Fail
Fail
Change L704.
Fail
Re-soldering or Change the defect part.
Check the X100.
Pass
Check output
of TU500.
Pass
- 17 -
Check 5V of TU500.
Fail
Re-Soldering or change
the defect part.