LG OLED Power Supply Testing: Finding the Fault with a Multimeter (EAY65689423 / EAY65689411)

Your LG OLED TV no longer turns on, or only starts intermittently? In this video we show how a qualified electrician systematically tests the EAY65689423 power supply board and the nearly identical EAY65689411, from the least to the greatest effort. All measurements come from our workshop. From more than 1,000 repairs we know that in the vast majority of cases one of two areas of the board is affected. Using two real boards, we show how a few measurements clearly locate the fault. What this video covers Discharge check: measuring the residual voltage on the large electrolytic capacitors until it is preferably below 30 V Visual inspection for burnt or ruptured components Measuring fuses F100 and F801 and the inrush current limiter (ICL, TH101) Assigning the fault to block 1 or block 2, with a cross-check on the solder side Fault pattern B: aged film capacitors as the cause of intermittent start-up problems Chapters 0:00 Introduction 0:20 Typical fault symptoms 1:04 The two typical defects 1:47 Residual voltage: is the board safe to touch? 3:24 Visual inspection 3:42 Measure the front side 5:06 Assign the fault to a block 5:36 Confirm the finding on the back side 9:25 Check the film capacitors 10:15 Result and next steps amparioweb services We specialise in LG OLED power supply boards. Fixed-price repair for €74.99, usually completed on the same or next working day after arrival: https://amparioweb.com/en/reparatur Refurbished power supply boards, also as an exchange for your faulty board: https://amparioweb.com/en/bauteile We buy faulty power supply boards at a fixed price: https://amparioweb.com/en/ankauf Help finding the right part number: https://amparioweb.com/en/nummer-finden More videos LG OLED Power Supply Replacement: Removal and Installation in 12 Steps Liability notice: This video is for general information only and shows one possible procedure. It does not replace professional training and is not an invitation to work on devices yourself. Working on power supplies and other mains-voltage parts is life-threatening and should only be carried out by qualified electricians. If you carry out the steps shown yourself, you do so at your own responsibility and risk. We are not liable for damage to persons, devices or other property. This does not apply in cases of intent or gross negligence, injury to life, body or health, or any other cases of mandatory statutory liability.