Originally Posted by csmeance
a few more pixels have gone south after I used it to play some video games with an Xbox 360. Now there are about 10 or so pixels dead/wrong all over the screen that are starting to get a bit annoying. These pixels are black on bright scenes and are white otherwise. Any clues as to what it may be or is it time to call up samsung or TVRepair?
This is an excerpt from the 5687 service manual but it probably also applies to the 6198. It describes tests for the DMD board. It might be a good place to start.Note: Entering service mode will reset most of your user settings (brightness, contrast, etc., etc.). Record any settings that you've changed before entering service mode, so you can restore them later.
4-1-1 First Checklist for Troubleshooting
- The DDP3021 on the DMD board has a feature to display internal test patterns.
- DNle, which is an end port in the main board, has a feature to display internal test patterns.
- The X260 is the first output and the DNIe output is the second one, followed by DMD, which is the final one.
- The video path flow : RF/External input → X260 → DNIe FBEx → DDP3021.
■ Diagnosis By Module
1. Access Service Mode
(In Standby mode, press MUTE,1,8,2 and POWER to turn the screen on and enter service mode)
2. Check if there is an error in the DMD board
DDP3021 → TEST PATTERN → Press the right arrow key:
Options of FULL WHITE, BLACK, RED, GREEN and BLUE PATTERN and so on are displayed on the screen.
If Pattern does not appear or same symptom is appeared on DDP3021 pattern, this is a DMD board error.