If your Sony TV isn’t turning on, shuts off randomly, or flashes the standby light without displaying anything on screen, there’s a good chance your power supply board is to blame. Sound familiar? You’re not alone - power supply failure is one of the most common issues we see with Sony TVs! 😤
Today’s part spotlight is the 1-474-642-11 (also listed as 147464211, pictured above) Sony Power Supply, a widely used board found in several Sony models. This article will walk you through what this board does, how to recognize the signs of failure, how to identify the correct part number (not just the board number!), and how to replace it using a simple plug-and-play method.
Struggling to with the identification process? Check out our helpful YouTube video below:
⚠️ Common Symptoms of a Failed Sony Power Supply
Wondering if your power board is the culprit? Keep an eye out for these red flags:
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TV won’t turn on at all
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TV powers off after a few seconds
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No image on screen, but sound is present
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Standby light flashes with no display
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Burnt components or bulging/leaking capacitors on the board
💡 TVpartsToday Tip: If you’re seeing these symptoms, your whole TV probably isn’t toast - a bad power board is often an easy and affordable fix you can do at home!
🔌 Try This First: Power Cycle and Reset Procedure
Before you break out the toolbox, give this reset process a shot:
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Unplug the TV from the power outlet.
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Press and hold the power button on the TV itself (not the remote) for 30 seconds.
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Wait a full 60 seconds with the TV still unplugged.
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Plug it back in and power it on.
If the issue persists, your 147464211 power supply may need replacing.
🔦 Diagnosing Backlight Failure
Not sure if it’s the power board or your backlights? Try the simple flashlight test:
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Power on the TV in a dark room.
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Shine a flashlight at an angle across the screen.
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If you see faint shapes or menu items, your backlights aren’t working — and your power board may not be sending voltage to the LED strips.
💡 TVpartsToday Tip: Backlight failure often masquerades as a screen issue. But if your power board isn’t doing its job, the screen won’t light up properly — even if the panel itself is fine.
Want step-by-step visuals? Visit our blog: How to Perform the Flashlight Test
🔍 Identifying the Correct Part: Why Part Numbers Matter
When replacing TV parts, there’s one rule to live by:
✅ Always order by the manufacturer’s part number.
🚫 Never use the board number or visual similarity alone.
In this case, you’re looking for 147464211 (or 1-474-642-11) - usually printed on a white sticker or directly labeled on the power board.
Avoid using internal manufacturing numbers or board numbers (which may appear on the board in smaller print) - they can match multiple versions and won’t guarantee compatibility.
💡 TVpartsToday Tip: Confused by the sticker or part number? Snap a photo and email it to us at info@tvpartstoday.com - we’ll help confirm the exact match before you place your order.
🛠️ Replacing the 1-474-642-11: Plug and Play Installation
Replacing your Sony power supply isn’t as hard as it sounds. Here’s the basic process:
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Unplug your TV and lay it face-down on a soft, clean surface.
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Remove the back panel using a Phillips screwdriver.
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Locate the 147464211 power supply board (it's the one where the power cord connects).
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Take pictures of all wire and ribbon cable connections for reference.
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Carefully disconnect the cables and unscrew the old board.
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Install your new power supply, reconnect everything, and screw it back in place.
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Replace the back panel, plug it in, and power on!
💡 TVpartsToday Tip: Don’t rush! Take your time with the cable connections. Referring to your photos during reassembly will help ensure everything is in the right place.
Need more help? Check out our repair tutorials on YouTube for a visual walkthrough!
🧠 Final Thoughts: You’ve Got This!
The 1-474-642-11 (147464211) Sony Power Supply Board is one of the most frequently replaced parts in Sony TVs - and one of the easiest to install yourself with just a few tools and a little patience. Whether you're troubleshooting total power loss or flickering screens, swapping this board can breathe new life into your set without the high cost of a repair shop visit.
And remember: only use the exact part number when ordering. Even if boards look similar, using the wrong one can lead to further damage or an incompatible setup.
💬 Need Help?
If you’re still unsure about the issue or need to replace a part, reach out to TVpartsToday. We can help you identify the exact cause of the problem and provide the right replacement part!
Need a 1-474-642-11 specifically? Check to see if we have any in stock HERE!
Would you rather watch a video? Check out our helpful Troubleshooting 101 playlist over on YouTube!
Would you rather chat with a seasoned repair expert? Head on over to our TVRepairHelp subReddit!
📦 Need help finding the right board or part?
📞 Call us at 930-212-1975 or browse our inventory online.
🛠️ DIY-friendly parts, fast shipping, and expert support – only at TVpartsToday.