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Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, the described symptom always points to an internal hardware issue. Are you then considering a DIY (do-it-yourself) repair approach? If yes, do you have access to and familiar with a multi-meter and even perhaps a soldering iron?
Great on the DIY!
With the unit unplugged, open the rear and look over the power supply board (where the power cord is fed to). Visually inspect this board particularly for any bloated, leaky and failed capacitors.
Then determine the board number. Depending on regional version, it would be something like BN44-00375A or PC46CF2_ZSM.
Please post back results / observations of the above once tried.
I would be mobile a good part of today with sluggish/no Internet but would check back when able.
Hi again Vic and appreciate the post back.
Factors to consider:
However, it may be more to your advantage to consider a Samsung authorized Service Center (even at least for a quote or if available, a flat rate repair fee):
Please click HERE or contact(###) ###-####
Glad that the above information may serve your purpose and would appreciate a Positive Rating and/or an Accept if so warranted (if haven't done so).
Good luck and thank you too for the opportunity to be able to share the information.