@kckerler, Kerler, From forums I have looked at, these were known to have weak capacitor issues power supply/board. Below I will post a link to your TV's service repair guide. Try a reset as a 1st step from (RESET / INITIALIZATION GUIDE) page 24 in repair guide. Using the guide will tell how to read the diagnostic codes from your TV, tell you how to trouble shoot and possible causes and how to remove test components. Good luck.
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https://philips.encompass.com/shop/model...