When a DIY TV repair fails, it is often times not because the diagnosis was wrong but because the wrong replacement part was ordered. One of the most common mistakes we see at TVpartsToday is confusion between a board number and a part number. These two identifiers are not interchangeable, and knowing which one to use is critical if you want your repair to succeed the first time.
Every TV circuit board has multiple numbers printed on it. Only one of those numbers represents the exact version your TV needs. Ordering by the wrong one can result in incompatible firmware, missing features, or a board that simply will not work in your model at all.
One of the easiest ways to conceptualize this for DIYers, is the fact that board numbers can be the same on different parts, and different on the same parts. That is why they are not reliable tools for identification purposes. Whereas the part number being an exact match should always ensure compatibility!
If you prefer a visual explanation, we also cover this topic in detail in our helpful YouTube video below:
Why Board Numbers Exist and Why They Are Misleading
A board number is part of the manufacturing process. It is printed directly onto the circuit board and identifies the physical design of the PCB. This number helps manufacturers track board layouts during production, but it does not account for firmware, component population, or model specific configuration.
The problem is that the same board design can be used across multiple TVs that require different software or hardware revisions. Two boards can share the same board number and look identical while being completely incompatible once installed.
This is why ordering by board number alone is risky and often leads to failed repairs.
What a Part Number Actually Represents
A part number is the identifier that matters for replacement. It is assigned by the manufacturer and represents the exact version of that board intended for specific TV models. This includes firmware, internal configuration, and compatibility with the rest of the TV.
Part numbers are usually printed on a white barcode sticker attached to the board and labeled as P N or Part No. This sticker is what you should be referencing when searching for a replacement.
TVpartsToday Tip: If you are ever unsure which number is the part number, take a clear photo of the board and email it to info@tvpartstoday.com. We will identify the correct number for you before you order.
How This Plays Out Across Major TV Brands
Different manufacturers follow different numbering conventions, which adds to the confusion.
Samsung boards commonly display multiple numbers. Board numbers often begin with BN41 or BN97 and are printed directly on the PCB. These should not be used to order replacements. The correct part numbers usually begin with BN94, BN96, or BN44 and appear on a barcode label.
LG boards frequently show an EAX number etched into the board. This is a board number and should be ignored when ordering. LG part numbers typically begin with prefixes like EBT, EBR, EBU, or EAY and are found on the sticker.
Sony takes a different approach. Sony usually does not print the true part number on the board at all. Instead, you will see a board number that must be cross referenced to determine the correct replacement. This is why ordering Sony parts without proper lookup often leads to mistakes. At TVpartsToday, we handle this matching process for you.
Why Ordering by Part Number Saves Time and Money
Using the correct part number ensures the replacement board matches your TV’s firmware, inputs, and internal configuration. It eliminates compatibility issues and prevents unnecessary returns. In contrast, ordering by board number is essentially a gamble, even if the board looks identical.
Many customers contact us after installing a board that powers on but has missing functions, no picture, no sound, or does not boot properly. In most cases, the issue traces back to ordering by the wrong number rather than a defective part.
The One Rule to Remember
If the number is etched or printed directly on the circuit board, it is almost always a board number. If the number appears on a white barcode sticker, that is the part number you should use when ordering. Following this rule alone dramatically increases your chances of a successful DIY TV repair.
Understanding the difference between a board number and a part number is one of the most important skills a DIY TV repairer can learn. It prevents wasted money, reduces frustration, and turns a complicated repair into a straightforward fix.
When in doubt, do not guess. TVpartsToday is here to help you identify the correct part so you can repair your TV with confidence and get it working again the right way.
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!
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.
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