If your Hisense TV has a black screen but you can hear the sound, the most likely cause is a failed backlight — not a "real" black screen, but a screen with no light behind it. To check: shine a flashlight at the screen at an angle in a dark room. If you can see a faint picture, the panel is fine and the backlight LEDs need replacement.
The 30-second flashlight test
- Turn off all the room lights.
- Power on the TV.
- Wait 30 seconds for it to fully boot.
- Hold a phone flashlight at the bottom of the screen, angled up at about 30°.
- Look at the screen.
You see a faint picture: Backlight is dead. Skip to Fix 4.
Completely uniform black: Either the TV isn't outputting video (signal issue) or the panel itself is bad.
Fix 1 — Wrong input source
The most common "black screen" complaint isn't a hardware issue — it's that the TV is set to an HDMI input that has nothing connected. Press the Source/Input button.
Fix 2 — HDMI handshake failure
- Unplug the HDMI cable from BOTH ends.
- Wait 30 seconds.
- Plug back in firmly.
- Power-cycle the source device and the TV.
Cheap HDMI cables (especially 4K-HDR-rated) sometimes fail the handshake on Hisense TVs even though they work on Samsungs/LGs.
Fix 3 — HDR or 4K refresh-rate mismatch
Hisense's HDMI handshake is finicky with 4K@120Hz HDR sources. On PS5: Settings → Screen and Video → Video Output → 4K Video Transfer Rate → Automatic. Or enable Game Mode on the TV.
Fix 4 — Backlight failure (the Hisense Achilles heel)
If the flashlight test showed a faint image, your backlight LEDs are dead. This is the single most common "black screen with sound" failure on Hisense TVs. Affected models: primarily (50R6, 55H8G, 65H9G, 75H9G).
Repair options:
- Warranty if under 2 years old — free.
- DIY — varies in replacement LED strips. Requires opening the TV. ~2-3 hours.
- Professional — varies.
Fix 5 — T-CON board failure
Sometimes the screen flashes briefly during boot, then goes black. T-CON boards are varies on eBay for most Hisense models. ~1 hour repair.
Hisense Roku TV — specific quirks
The "Roku is updating" silent freeze: unplug for 5 minutes, plug back in.
The streaming-app-crash black screen: press Home button to exit and return to Roku home.
FAQ
Most likely the backlight LEDs have failed. The flashlight test confirms.
Usually a firmware-update freeze or streaming app crash. Unplug for 5 minutes.
Is a black screen on a Hisense TV covered under warranty?
Backlight failures are covered under standard 1-2 year Hisense warranty.