4C-LB4321-HR LED Backlight Strips for TCL TVs
4C-LB4321-HR LED Backlight Strips: TCL TV Replacement Guide
Looking for 4C-LB4321-HR LED backlight strips to repair your TCL 43-inch television? The GuuYebe replacement kit includes two LED strips for select TCL TVs, including 43S431, 43S435, 43S434 and 43S433. This buying guide explains the kit specifications, compatible model references, and what to check before ordering.
View 4C-LB4321-HR Replacement Kit at GuuYebe
What’s Included in the Replacement Kit?
The GuuYebe kit contains 2 LED backlight strips, each listed at approximately 812 mm (31.96 inches) with 21 LED beads per strip. The complete set contains 42 LEDs. These are fixed-length replacement parts and should not be cut or modified.
- Primary part number: 4C-LB4321-HR
- Related board numbers: 43HR330M21A1, 43HR330M21A0 V1 and 4C-LB4321-HR03J
- Strip length: 812 mm, as listed
- LED count: 21 LEDs per strip
- Package contents: 2 LED backlight strips
- Panel references: LVU430NDEL, MS9W04 V1 and MS9W13 V4
Which TCL TV Models May Be Compatible?
The supplied product information lists TCL 43S431, 43S435, 43S434 and 43S433. Additional references include the 43S425 versions LAAA, LABA, LBAA, LDAA, TDAA, VDAA and VDBA.
Important: A matching television model does not always guarantee the same backlight assembly. Before purchasing, compare the original strip markings, LED count, connector positions, mounting holes and overall layout. Panel references such as LVU430NDEL MS9W04 V1 and LVU430NDEL MS9W13 V4 can help with identification.
TV Has Sound but No Picture?
If your TCL television plays sound but the screen stays black, failed LED backlighting is one possible cause. With the TV fully assembled and powered on, shine a flashlight at an angle across the screen. A faint visible image may suggest a backlight issue.
However, this test does not prove the strips are defective. The LED driver or power circuitry may also be responsible. For more information, read the TV Has Sound But No Picture troubleshooting guide.
Is This TCL Backlight Kit Worth Buying?
The 4C-LB4321-HR LED backlight strips kit is worth considering when your original assembly matches the listed part numbers and dimensions. Replacing both matching strips can be a practical choice when repairing a confirmed backlight failure.
Installation requires removing the LCD panel and diffuser layers. These components are fragile, and internal electrical circuits can remain hazardous after unplugging the television. If you lack repair experience, consider professional assistance.
Frequently Asked Questions
How many LED strips are included? Two strips, with 21 LEDs per strip according to the product specifications.
Will this fit every TCL 43S435? Not necessarily. Verify the original backlight part numbers, layout and panel version.
Can the strips be cut to fit? No. These replacement strips have fixed lengths.
Does a black screen always mean bad LED strips? No. The backlight driver, power supply or other components may also require diagnosis.