TCL 55S425 LED Backlight Strips Replacement
TCL 55S421, 55S423 & 55S425 LED Backlight Strips
Does your TCL 55-inch TV have sound but a dark screen? If diagnosis confirms failed backlighting, this GuuYebe four-piece LED backlight strip kit may be worth considering for select TCL 55S421, 55S423 and 55S425 televisions. The strip family includes SJ.SB.D5500801-3030H and related 4C-LB5507 / 4C-LB5508 markings. Confirm your original parts before purchasing.
View the TCL 55-Inch Backlight Kit at GuuYebe
What’s Included in the Four-Strip Kit?
According to the supplied product specifications, the set includes two 470 mm strips with 7 LEDs each and two 543 mm strips with 8 LEDs each. Together, a 470 mm and a 543 mm section form a listed 1,013 mm A+B assembly with 15 LEDs. The kit therefore contains 30 LEDs across four pieces. The stated 6 V is per LED, not the supply voltage of a complete assembly.
- Main strip family: SJ.SB.D5500801-3030H.
- Related markings: 4C-LB5507-HR02J, 4C-LB5508-HR02J, 55HR330M07B2 and 55HR330M08A2.
- Other listing references: GIC55LB111, GIC55LB112 and SJ.SB.D5500801-3030HL-M-HF.
- Installation: double-sided adhesive backing; the strips must not be cut.
Which TCL Models Are Listed?
Product references include 55S421, 55S423 and 55S425, together with suffixes such as 55S421LBAA, 55S421ZCAA, 55S423TCAA, 55S425LFBA, 55S425TFAA and 55S425TFBA. The related panel identifier LVU550NDEL SJ9W01 V3 is not itself a television model.
Fitment tip: match the full TV model, both original strip lengths, 7-LED/8-LED arrangement, printed codes, connector placement and mounting points. A model-family match does not establish compatibility with every production version. Related part numbers should not be assumed interchangeable.
TV Has Sound but No Picture?
A faulty backlight is one possible cause of a black screen with working audio. With the TV fully assembled and operating, a flashlight directed at an angle may reveal a faint image. This is not a definitive diagnosis: the LED driver and power supply can produce similar symptoms. See GuuYebe’s TV Has Sound But No Picture troubleshooting guide.
Should You Replace the Complete Set?
If testing confirms failed LED strips and the original parts match, replacing the full set avoids mixing new strips with similarly aged ones. LCD panel removal carries glass-breakage and electrical risks; consult a qualified repair technician if you lack experience.
Quick FAQs
How many strips are included?
Four: two 470 mm seven-LED pieces and two 543 mm eight-LED pieces.
Is each strip 1,013 mm long?
No. That is the combined length of one 470 mm plus one 543 mm A+B assembly.
Does the kit fit every TCL 55S425?
Not necessarily. Compare the complete model and the original light bars before ordering.
Buy TCL 55-Inch LED Backlight Strips
Need help with fitment? Send the complete TV model and photos of the original strip markings to [email protected].