Phone displays thick row pale, adjust contrast control, asking a client is unable to provide valid information. Teardown at sight display connections are welded. Similar fault just welded on LCD Samsung 600C following a row of capacitors to troubleshooting. Check out wiring diagrams found C411-C422 and display interfaces connected to Rosin using a heat gun, put a little melt blowing capacitors after cleaning the washing power on test machine, appears to be perfectly normal, the contrast can be adjusted. Estimated that this machine was dropped, making the partial capacitance caused by cold solder joint failure.Jq8service manual download site