If the screen stays on long enough try the using the TV’s Self Diagnostic screen display feature as described in p16-17 of the [https://elektrotanya.com/sony_kdl-40hx850_kdl-40hx853_kdl-40hx855_kdl-46hx850_kdl-46hx853_kdl-46hx855_kdl-55hx850_kdl-55hx853_kdl-55hx855_chassis_az3f_ver.3.0_segm.3a-g_305pages.pdf/download.html|service manual] and check if there is anything there that may point to the problem.
To download the file, click on the ''I’m not a robot'' checkbox below the Document preview box and then on the ''Go to Download'' box.
When the sentence below the Document preview box changes from ''This file is downloadable free of charge (5/day): ...processing...'' to ''This file is downloadable free of charge (5/day): Download (sony kdl-40hx850 kdl-40hx853 kdl-40hx855 kdl-46hx850 kdl-46hx853 kdl-46hx855 kdl-55hx850 kdl-55hx853 kdl-55hx855 chassis az3f ver.3.0 segm.3a-g 305pages),'' click on ''Download'' as this is the link.
Be patient as it takes a little while to find the file.
Here’s an image taken from the file that shows what to do.
[image|1943433]
(click on image to enlarge for better viewing)
=== Update (12/01/2019) ===
Hi @gh1994 ,
OK take 2.
Here’s the fault triage chart and the no picture troubleshooting flowchart.
-
The triage chart seems to favour the BAP board and the flowchart goes for the TCON board last, although it is mentioned as a possibility in the triage chart.
+
The triage chart seems to favour the BAP board and the flowchart goes for the TCON board last as well after the B and G boards, as well as their harnesses, although it is mentioned as a possibility in the triage chart.
If the screen stays on long enough try the using the TV’s Self Diagnostic screen display feature as described in p16-17 of the [https://elektrotanya.com/sony_kdl-40hx850_kdl-40hx853_kdl-40hx855_kdl-46hx850_kdl-46hx853_kdl-46hx855_kdl-55hx850_kdl-55hx853_kdl-55hx855_chassis_az3f_ver.3.0_segm.3a-g_305pages.pdf/download.html|service manual] and check if there is anything there that may point to the problem.
To download the file, click on the ''I’m not a robot'' checkbox below the Document preview box and then on the ''Go to Download'' box.
When the sentence below the Document preview box changes from ''This file is downloadable free of charge (5/day): ...processing...'' to ''This file is downloadable free of charge (5/day): Download (sony kdl-40hx850 kdl-40hx853 kdl-40hx855 kdl-46hx850 kdl-46hx853 kdl-46hx855 kdl-55hx850 kdl-55hx853 kdl-55hx855 chassis az3f ver.3.0 segm.3a-g 305pages),'' click on ''Download'' as this is the link.
Be patient as it takes a little while to find the file.
Here’s an image taken from the file that shows what to do.
[image|1943433]
(click on image to enlarge for better viewing)
=== Update (12/01/2019) ===
Hi @gh1994 ,
OK take 2.
Here’s the fault triage chart and the no picture troubleshooting flowchart.
-
There seems to be a bit of a conflict between the two as the triage chart seems to favour the BAP board and the flowchart goes for the TCON board first, although it is mentioned as a possibility in the triage chart.
+
The triage chart seems to favour the BAP board and the flowchart goes for the TCON board last, although it is mentioned as a possibility in the triage chart.
If the screen stays on long enough try the using the TV’s Self Diagnostic screen display feature as described in p16-17 of the [https://elektrotanya.com/sony_kdl-40hx850_kdl-40hx853_kdl-40hx855_kdl-46hx850_kdl-46hx853_kdl-46hx855_kdl-55hx850_kdl-55hx853_kdl-55hx855_chassis_az3f_ver.3.0_segm.3a-g_305pages.pdf/download.html|service manual] and check if there is anything there that may point to the problem.
To download the file, click on the ''I’m not a robot'' checkbox below the Document preview box and then on the ''Go to Download'' box.
When the sentence below the Document preview box changes from ''This file is downloadable free of charge (5/day): ...processing...'' to ''This file is downloadable free of charge (5/day): Download (sony kdl-40hx850 kdl-40hx853 kdl-40hx855 kdl-46hx850 kdl-46hx853 kdl-46hx855 kdl-55hx850 kdl-55hx853 kdl-55hx855 chassis az3f ver.3.0 segm.3a-g 305pages),'' click on ''Download'' as this is the link.
Be patient as it takes a little while to find the file.
Here’s an image taken from the file that shows what to do.
[image|1943433]
(click on image to enlarge for better viewing)
+
+
=== Update (12/01/2019) ===
+
Hi @gh1994 ,
+
+
OK take 2.
+
+
Here’s the fault triage chart and the no picture troubleshooting flowchart.
+
+
There seems to be a bit of a conflict between the two as the triage chart seems to favour the BAP board and the flowchart goes for the TCON board first, although it is mentioned as a possibility in the triage chart.
If the screen stays on long enough try the using the TV’s Self Diagnostic screen display feature as described in p16-17 of the [https://elektrotanya.com/sony_kdl-40hx850_kdl-40hx853_kdl-40hx855_kdl-46hx850_kdl-46hx853_kdl-46hx855_kdl-55hx850_kdl-55hx853_kdl-55hx855_chassis_az3f_ver.3.0_segm.3a-g_305pages.pdf/download.html|service manual] and check if there is anything there that may point to the problem.
-
To download the file, click on the ''I’m not a robot'' checkbox and then on the ''Go to Download'' box.
+
To download the file, click on the ''I’m not a robot'' checkbox below the Document preview box and then on the ''Go to Download'' box.
When the sentence below the Document preview box changes from ''This file is downloadable free of charge (5/day): ...processing...'' to ''This file is downloadable free of charge (5/day): Download (sony kdl-40hx850 kdl-40hx853 kdl-40hx855 kdl-46hx850 kdl-46hx853 kdl-46hx855 kdl-55hx850 kdl-55hx853 kdl-55hx855 chassis az3f ver.3.0 segm.3a-g 305pages),'' click on ''Download'' as this is the link.
Be patient as it takes a little while to find the file.
Here’s an image taken from the file that shows what to do.
If the screen stays on long enough try the using the TV’s Self Diagnostic screen display feature as described in p16-17 of the [https://elektrotanya.com/sony_kdl-40hx850_kdl-40hx853_kdl-40hx855_kdl-46hx850_kdl-46hx853_kdl-46hx855_kdl-55hx850_kdl-55hx853_kdl-55hx855_chassis_az3f_ver.3.0_segm.3a-g_305pages.pdf/download.html|service manual] and check if there is anything there that may point to the problem.
-
To download the file, click on the ''I’m not a robot'' checkbox and then on the ''Go to Download'' box. When the sentence below the Document preview box changes from ''This file is downloadable free of charge (5/day): ...processing...'' to ''This file is downloadable free of charge (5/day): Download (sony kdl-40hx850 kdl-40hx853 kdl-40hx855 kdl-46hx850 kdl-46hx853 kdl-46hx855 kdl-55hx850 kdl-55hx853 kdl-55hx855 chassis az3f ver.3.0 segm.3a-g 305pages),'' click on ''Download'' as this is the link. Be patient as it takes a little while to find the file.
+
To download the file, click on the ''I’m not a robot'' checkbox and then on the ''Go to Download'' box.
+
+
When the sentence below the Document preview box changes from ''This file is downloadable free of charge (5/day): ...processing...'' to ''This file is downloadable free of charge (5/day): Download (sony kdl-40hx850 kdl-40hx853 kdl-40hx855 kdl-46hx850 kdl-46hx853 kdl-46hx855 kdl-55hx850 kdl-55hx853 kdl-55hx855 chassis az3f ver.3.0 segm.3a-g 305pages),'' click on ''Download'' as this is the link.
+
+
Be patient as it takes a little while to find the file.
Here’s an image taken from the file that shows what to do.
Hi @gh1994 ,
If the screen stays on long enough try the using the TV’s Self Diagnostic screen display feature as described in p16-17 of the [https://elektrotanya.com/sony_kdl-40hx850_kdl-40hx853_kdl-40hx855_kdl-46hx850_kdl-46hx853_kdl-46hx855_kdl-55hx850_kdl-55hx853_kdl-55hx855_chassis_az3f_ver.3.0_segm.3a-g_305pages.pdf/download.html|service manual] and check if there is anything there that may point to the problem.
To download the file, click on the ''I’m not a robot'' checkbox and then on the ''Go to Download'' box. When the sentence below the Document preview box changes from ''This file is downloadable free of charge (5/day): ...processing...'' to ''This file is downloadable free of charge (5/day): Download (sony kdl-40hx850 kdl-40hx853 kdl-40hx855 kdl-46hx850 kdl-46hx853 kdl-46hx855 kdl-55hx850 kdl-55hx853 kdl-55hx855 chassis az3f ver.3.0 segm.3a-g 305pages),'' click on ''Download'' as this is the link. Be patient as it takes a little while to find the file.
Here’s an image taken from the file that shows what to do.
[image|1943433]
(click on image to enlarge for better viewing)