Little Green Lines All Over Screen
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Little Green Lines All Over Screen
I have a 42" (model #HL-R4266W) Samsung DLP TV and recently I have all these little green lines on the screen (see attached picture). The lines appear over the menu screens and I have no idea what to do.....I would appreciate any help I can get.
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Re: Little Green Lines All Over Screen
Hi sanfor34,
This seems to be a DMD board issue. My recommendation: replace it.
Hope this helps.
This seems to be a DMD board issue. My recommendation: replace it.
Hope this helps.
Re: Little Green Lines All Over Screen
I can't tell from the photo if the lines are truely imposed over the menu or if the menu is transparent and allowing the lines to show through. Try making the menu opaque and see if the lines still are visible over the menu.
Also, check the PIP to see if the lines appear over that. If the lines still appear over the opaque menu and the PIP, it's probably the DMD board.
If you're interested in doing more debugging, you could go into the service menu. The test patterns will help you isolate the problem area. A downloadable service manual can be had online for $15 if you want to investigate further. Here is the relevant section from the service manual for my HL-R4667W:
■ Basics:
- The DDP1011 on the DMD board has a feature to display internal test patterns.
- DNle, which is an end port in the digital board, has a feature to display internal test patterns.
- The analog board sends signals to ADV7401 on the digital board.
- The analog board is the first output and the digital board is the second one, followed by DMD, which is the final one.
■ 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
DDP1011 → TEST PATTERN → Press the right arrow key:
Options of FULL WHITE, BLACK, RED, GREEN and BLUE PATTERN are displayed on the screen.
If "Pattern" does not appear, this is a DMD board error.
3. Check if there is an error in the digital board before the DMD.
When the DMD board has been determined to be error free based on the test patterns:
FACTORY MODE → DNIe → TEST PATTERN normal display: no error in the digital board.
If "Pattern" does not appear, it may be from a DMD board or ATI error or there is an analog board malfunction.
Also, check the PIP to see if the lines appear over that. If the lines still appear over the opaque menu and the PIP, it's probably the DMD board.
If you're interested in doing more debugging, you could go into the service menu. The test patterns will help you isolate the problem area. A downloadable service manual can be had online for $15 if you want to investigate further. Here is the relevant section from the service manual for my HL-R4667W:
■ Basics:
- The DDP1011 on the DMD board has a feature to display internal test patterns.
- DNle, which is an end port in the digital board, has a feature to display internal test patterns.
- The analog board sends signals to ADV7401 on the digital board.
- The analog board is the first output and the digital board is the second one, followed by DMD, which is the final one.
■ 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
DDP1011 → TEST PATTERN → Press the right arrow key:
Options of FULL WHITE, BLACK, RED, GREEN and BLUE PATTERN are displayed on the screen.
If "Pattern" does not appear, this is a DMD board error.
3. Check if there is an error in the digital board before the DMD.
When the DMD board has been determined to be error free based on the test patterns:
FACTORY MODE → DNIe → TEST PATTERN normal display: no error in the digital board.
If "Pattern" does not appear, it may be from a DMD board or ATI error or there is an analog board malfunction.