Expert Tips for Samsung Power Supply Issues

Power Supply Troubleshooting Guide for Samsung TVs

If your Samsung TV is experiencing NO POWER, NO BACKLIGHTS, or CYCLES ON and OFF, follow this simple troubleshooting method to determine if the power supply is the issue.

⚠️ Safety First

  • Unplug the TV from the wall outlet before opening the back panel
  • Wait at least 10 minutes for capacitors to discharge
  • Work on a clean, flat surface with adequate lighting
  • If you're uncomfortable working with electronics, consult a professional

Step-by-Step Troubleshooting Process

  1. Power off and unplug your TV from the wall outlet
  2. Remove the back panel of your TV (usually held by Phillips head screws)
  3. Locate the boards:
    • Power Supply Board (brown board with large capacitors)
    • Main Board (green board, usually in the center)
  4. Disconnect the cable between the Main Board and Power Supply Board
  5. Plug the AC cord back into the Power Supply Board
  6. Observe the LED backlights

Interpreting the Results

✓ If the LED backlights come on:

GOOD NEWS! Both your Power Supply Board and LED Backlights are functioning properly. The issue is likely with your Main Board.

Next step: Consider replacing the Main Board.

✗ If the LED backlights do NOT come on:

Either the Power Supply Board or the LED Backlights (or both) are faulty.

Next steps:

  • Check for blown capacitors on the power supply (bulging or leaking)
  • Test the power supply voltage outputs with a multimeter
  • Consider replacing the Power Supply Board first, as it's the most common failure point

Additional Troubleshooting Tips

  • Visual inspection: Look for burnt components, swollen capacitors, or damaged traces on the power supply board
  • Smell test: A burnt electronics smell often indicates a failed component
  • Check connections: Ensure all cables are firmly seated before testing
  • Model compatibility: This method works for most Samsung LED/LCD TVs manufactured after 2010

Common Samsung Power Supply Issues

  • Failed capacitors (most common)
  • Blown fuses or MOSFETs
  • Damaged voltage regulators
  • Faulty standby power circuits

Need Replacement Parts?

We stock genuine and compatible power supply boards for most Samsung TV models. Search by your TV model number to find the correct replacement part.

Questions? Contact our technical support team for assistance with your specific model.