hi
it is possible to perform a an internal diagnostic test of samsung tv hardware by pressing the RETURN key on the remote control for nearly 10-15 seconds. since everything is OK in my tv, it produced a very simple report but it may locate problems on other TVs if there is a problem, but I don't have detailed information about how it works technically. FYI only.
TV reboots after the test and runs normally. No change is perfomed in setup values
built in hardware diagnostic test by pressing return key
This forum for information that related with C series hardware instead of firmware/software.
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