Vizio tv powers on, but turns itself off after a couple of minutes. Do I need new power board or main board or both?
Vizio support had me unplug tv and manually hold down power button for 30 seconds. This did not solve the problem.
Televison & Video - Vizio - E550i-B2 55" LED TV 1920x1080, 120 Hz, HDTV
Answers & Comments
Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size