Vizio TV Won’t Turn On? How to Fix It by Replacing the Power Board

If your Vizio TV won’t turn on; no lights, no logo, no response to the remote, don’t throw it away just yet. In many cases, the problem is a failed power board, and the fix is far easier and cheaper than replacing the entire TV.

In this guide, I’ll walk through exactly how I diagnosed and fixed a Vizio V‑Series 50‑inch TV that appeared completely dead. This same process applies to many Vizio models and is one of the most common TV failures I see.

Watch the full step-by-step repair video below:

https://www.youtube.com/watch?v=jSQ8c3Pq0Ps

COMMON SYMPTOMS

• TV will not power on at all

• No standby light

• Power button on the back does nothing

• Remote does nothing

• Outlet confirmed working

STEP 1: CONFIRM THE PROBLEM

Before opening the TV, confirm the outlet works, the power cord is secure, and the rear power button does not respond.

STEP 2: REMOVE THE BACK COVER

Lay the TV face‑down on a soft surface. Remove all screws holding the rear panel. Before lifting the cover completely, unplug the small connector for the rear power button.

STEP 3: IDENTIFY THE POWER BOARD

The power board is the most common failure point when a TV is completely dead.

STEP 4: ORDER A REPLACEMENT BOARD

Match the exact part number printed on your board. Replacement boards are inexpensive compared to a new TV.

STEP 5: REMOVE THE OLD POWER BOARD

Disconnect wire harnesses, remove mounting screws, and lift the board out carefully.

STEP 6: INSTALL THE NEW POWER BOARD

Compare boards visually, install the new board, reinstall screws, and reconnect all harnesses.

OPTIONAL: REPLACE THE MAIN BOARD

If available, replacing the main board at the same time can eliminate additional troubleshooting.

STEP 7: TEST THE TV

Plug the TV in and confirm the Vizio logo appears and SmartCast boots normally.

FINAL THOUGHTS

A Vizio TV that won’t turn on is often not dead—it usually just needs a new power board. This repair takes less than 30 minutes and can save hundreds of dollars.

Good Luck!