How to Troubleshoot Power Supply with no Standby voltage. Sony KD 70x690E led TV repair.

Here we have a 70 inch Sony Bravia 4K LED Smart TV model KD-70X690E with no picture, no power, and no standby light on the bottom of the television. TV is totally dead. The primary side voltages are fluctuating and no secondary side voltage rails are coming up, including the 5 volt standby voltage. I will show you a secret method to isolate if the problem is on the Primary or the Secondary side of the Power Supply. This is a complete troubleshooting method that you can use on any Switch Mode Power Supply board. The ART Facebook Group:   / 850660809553928   Switch-Mode Power Supply Course: https://bigdogtvrepaircourse.mykajabi...