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TCL08-AU55CUN-OC402AA Main Board for 55S421 (Service No. 55S421LGAA) 55S423

SKU:
sj-08-AU55CUN-OC402AA
$63.70
(You save $34.91)
$28.79
$63.70
(You save $34.91)
$28.79
180-Day Warranty
Ships same business day if ordered before 4pm CT!
We highly recommend matching your part number. Learn more
PLEASE NOTE: There may be more than one different main board for this model. This board is compatible with 55S421 TVs with Service No. 55S421LGAA (found on sticker on back of TV).


Known Models

BrandModelsVersions
TCL55S42155S421LGAA
55S421LGAA
55S423,
55S425LHBA
55S423LIAA
55S425
Part Number:
08-AU55CUN-OC402AA
Warranty:
180-Day Warranty
Board Number:
40-MST10F-MAA2HG| 08-MST1003-MA200AA| 08-AU55CUN-OC402AA| 08-MST1003-MA300AA| V8-ST10K01-LF1V1291
Notes:
ShopJimmy recommends ordering by part number whenever possible. Often times there are TV models that use more than one set of parts and/or panels.
Part Type:
Main Board
Part Usage:
LED/LCD
Models:
55S421
Models:
55S423
Models:
55S425LHBA
Models:
55S421LGAA
Models:
55S423LIAA
Brands:
tcl
Models:
55S425

Videos

What is a power supply board?

Your TV’s power supply board takes the AC voltage from your outlet and converts it to various DC voltages needed to power everything in your TV.

Which symptoms does a power supply board fix in a TV?

•  If your TV doesn’t turn on, it could be the power supply board.

•  If you see very dim video or no video on the screen, but you know your TV has power and is on, then the power supply could be bad.

•  If your TV turns on and then shuts off quickly, it could be your power supply board.

*These are helpful tips to get you started and don’t represent accurate diagnoses for every TV model and failure. If you’re unsure of your diagnosis, we recommend checking out our YouTube channel or reaching out to a local TV technician for assistance.

How easy is it to replace a power supply board?

It's easy! Once you match the part number on your power supply board with the part number listed on this page to confirm compatibility, you’ll just need a screwdriver and the ability to remove the back of your TV and replace the board.