LG BD390 Service Manual page 73

7. SHOWING BAD COLOR ,NO OUTPUT OR MIXED COLOR ON THE
SCREEN USING HDMI. (BD390)
When unit is connected the TV using HDMI, picture shows bad color, no output or mixed color
on the screen. But component output is ok.
7-1. Solution
Replace JK603 on main board.
7-2. How to troubleshoot (Countermeasure)
1) Please check JK603, IC609 on your eyes.
2) If JK603 , IC609 PINS shorted because of solder problem, unsolder and remove shorted point.
3) If there is no soldering problem , replace JK603.
4) After changing it, if the set is still NG, check MPEG IC(IC201). Refer to item 5-7.
7-3. Service hint (Any picture / Remark)
< Main board bottom view >
COMPONENT REPAIR GUIDE
JK603
< Main board top view >
3-60