TCL 5-Series Roku TV S555 troubleshooting

Published specification

What is true of this model and changes how you fix it

• Panel — QLED, no Mini-LED
  The 5-Series S555 is a QLED with a conventional LED backlight and basic local dimming — good color, but weaker contrast control than the Mini-LED 6-Series/QM models, so more blooming and raised dark-room blacks. That is the tier, not a fault.
• Smart platform — ROKU TV
  Runs Roku OS built in. Update at Settings › System › System update; Miracast and AirPlay 2 for mirroring; a Roku remote and app store. Not Google TV.
• Refresh — 60Hz
  A native 60 Hz panel with HDMI 2.0-class inputs — no 4K 120 Hz or VRR. It supports Dolby Vision for HDR, but high-refresh gaming is not part of this model.
• Sizes
  50, 55, 65 and 75 inches (50S555, 55S555, 65S555, 75S555). Roku is the smart platform.
• Where the label is
  The 5-Series S555 has its model and serial on a label at the rear, near the HDMI ports. TCL's support is organized by the series and size, and the number helps match the right download.
• Setting up Google TV
  Choose a profile, sign in to Google and install the apps you use. The remote's Google Assistant button handles voice searches. Adjust picture modes under Settings, Display and sound.
• Care
  Place the TV with its vents clear, avoid cleaning the screen with liquids sprayed directly on it and update the software now and then.
• Picture and sound
  The 5-Series gives a good picture in Movie mode, and the speakers are modest, so a soundbar helps. Connect it to the ARC port and select it as the audio output. Set the picture to Movie for films.
• Streaming
  Google TV lists services in rows. Use the voice button to search by title. A remote that is slow may need new batteries. Restart the TV if apps freeze.
• Warranty and mounting
  Mount the S555 on a bracket rated for its weight and the VESA pattern in the manual, or use the stand legs. Keep the receipt for the warranty, and note the model and serial for support.
• Picture settings
  The S555 is a QLED set with local dimming controls. In a dark room, Movie mode with a low backlight gives the best result for films. In a bright room, raise the backlight and turn off any energy saving that dims the picture. Game mode is available for consoles, and it reduces the processing that adds delay.
• Network and updates
  The set joins 2.4 and 5 GHz Wi-Fi. If streaming stutters, move the router closer, or connect the TV by cable if the model has a port. Update the software in Settings, System, Software update, and restart the TV after a large update.

Where these figures were read. us.tcl.com/products/tcl-55-s-class-4k-uhd-hdr-led-smart-tv-with-google-tv-55s551g (current successor line is S Class/S551G; S555 is an older naming) (QLED, 60Hz, ROKU TV)

Manufacturer support for this product line. TCL Support — TCL Roku TV support. TCL's own TCL Roku TV troubleshooting hub.

Also read for this model. RTINGS — TCL S555 review; Digital Trends — TCL 5-Series (S555) Roku TV review.