Reading TV board part numbers: Samsung, LG, Sony, Panasonic and others

Parts and decisions · Published 2026-10-20 · Updated 2026-10-24

A TV board usually carries two or three different numbers. Knowing which is which, and what the prefixes tend to mean for each brand, saves a lot of wrong orders.

Three kinds of number

1. The service or assembly part number, usually on a barcode sticker. It identifies the board as assembled, with its components and often its firmware. This is the number a manufacturer's parts department uses, and normally the one to match.
2. The PCB number, printed in the silkscreen or copper. It identifies the bare circuit board design. One bare board can be built into several assemblies that differ in components, connectors or software, so two boards with the same PCB number are not necessarily interchangeable.
3. A role code, on some brands: a short name for the board's function (Sony's and Panasonic's letter codes, for example).

Photograph every label on the old board before you remove it. If the sticker is missing or unreadable, the PCB number plus the TV's model and version is the next best thing.

Samsung

Samsung main boards are a frequent source of confusion: the same TV model can use different BN94 main boards depending on its version code, and two main boards built on the same BN41 PCB can carry different software for different models. The match that matters is the full sticker number with its final letter, against the TV's model and version.

Older Samsung boards can carry other prefixes (for example AA41- or BP59-). The approach is the same: search for the complete number together with the TV model, and do not infer the board's role from the prefix alone.

Samsung plasma panels were also used in TVs sold under other names, so an LJ92 board can turn up in a set that is not branded Samsung. Parts sellers list some LJ92 kits for Philips, Magnavox and Dell plasma models as well as Samsung ones.

LG

LG main boards are matched by EBT number and by the full model code, including the suffix that follows the dot on LG's labels. LG plasma sustain boards are panel-specific: a forum thread on a 42-inch LG plasma notes that a Y-sustain and Z-sustain set from a different panel was not a drop-in swap, even though both were LG boards.

LG Display panels were used by many TV brands, so an LG-numbered T-con can sit inside a set of another brand.

Sony

• 1-474-xxx-xx on the sticker usually identifies a power supply block. Parts listings for 1-474-163-51, for example, describe it as the power supply for a family of 32-inch Bravia models.
• A-xxxx-xxx-A (the last letter varies) is a mounted circuit board, the assembled board as Sony services it. It can be a main board or any other board: A-1727-314-A, for instance, is listed as the "BM3" main board for a 32-inch Bravia.
• 1-8xx-xxx-xx numbers printed on boards are listed by sellers as the board numbers that go with an A-number assembly.
• Sony also gives boards short letter names (BM3, BU, G-series power boards and so on) that appear in service manuals and listings.

Old links with these numbers, such as an A-number board, are best handled by searching the full number with the exact TV model, because Sony reused numbering families across many sets, including rear-projection (KDF) models.

Panasonic

• TXN/… or TXNA… numbers identify assembled boards, written with a slash on the sticker. TXN/A1… numbers are listed as "A boards", Panasonic's main board.
• TNPA… and TNPH… numbers are printed on the PCB and listed alongside the TXN number.
• Panasonic plasma sets name their boards by letters: A (main), P (power), SC (scan), SS (sustain), and smaller buffer and data boards. See plasma TV boards.

Old web addresses often write the slash as an underscore (TXN_A1…), because a slash cannot appear in a file name.

Panel makers' T-con numbers

T-con boards are numbered by the panel maker, not the TV brand. AU Optronics T-cons, for example, carry numbers of the form 55.46T02.C01, listed together with the panel model (such as T460HW02). Panels from Chi Mei (later part of Innolux) have model numbers beginning with a size code, such as V260… for a 26-inch panel. The panel label on the metal frame is what you match a T-con to. See T-con boards.

Vizio, Toshiba, Sanyo, Funai and other brands

Many TVs are designed or built by contract manufacturers, so the boards inside a Vizio, Toshiba, Sanyo, Westinghouse, Element or Emerson set often carry the board maker's numbering rather than a brand scheme. You may find an eight-digit brand part number, a code from the factory that built the board, or several codes at once.

The rule is the same as everywhere else: record every number on the board, search them together with the TV's full model and serial or version, and prefer a match on the assembled number.

Old shop links on this domain

This domain once hosted a TV parts shop whose product addresses contained part numbers written with underscores (for example BN44_00289B for BN44-00289B). Those links now lead here or to the guide for that type of board. Board Level does not sell the parts; to find one, see finding a compatible replacement board.

A quick checklist

1. TV model, full suffix, and version or revision code from the back label.
2. Sticker number on the old board, including the final letter or digits.
3. PCB number printed on the board.
4. For T-cons: the panel model from the panel's own label.
5. Firmware or software version, if the TV still starts (main boards explains why).

The TV model number on the back label is worth noting even when nothing is broken: it gives the weight and the wall-mount pattern when you move house (see moving with a flat-screen TV), and it is the first thing to check when buying a used TV.

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