Having your Hisense Roku TV suddenly stop turning on can be frustrating. This comprehensive guide will walk you through several troubleshooting steps to help get your TV powered back on. We’ll cover common issues like power problems, faulty cables, Roku system crashes, etc. With some basic checks and repairs, you can get your Hisense Roku TV up and running again quickly.
Some Basic Checks for Hisense Roku TV
- Check if the TV is plugged into a working electrical outlet. Make sure the power cable is securely connected to the TV and outlet. Unplug and replug it to ensure a proper connection.
- Check the wall outlet with another device, like a phone charger, to confirm the outlet provides power.
- Try using the original power cable that came with your Hisense Roku TV. Faulty or damaged cables can prevent the TV from turning on.
- Make sure all the cables connected to the TV are secure. This includes the HDMI cables, antenna/cable connection, etc. Faulty connections can stop the TV from powering on.
- If using a power strip or surge protector, try plugging the TV directly into the wall outlet. Overloaded or faulty power strips can prevent the TV from getting power.
- Press and hold the power button on the TV for 30 seconds to reset it. Sometimes, this helps force restart a frozen TV.
Hisense Roku TV Not Turning On: What to Do?
Step 1: Check Power and Cables
The power supply and cables are the first thing to check with any TV that won’t turn on. Make sure the TV is plugged into a working wall outlet. Confirm the power cable is securely inserted into the TV and wall outlet. Toggle the power switch on the back or side of the TV if there is one.
Unplug the power cable from the wall and TV, wait 60 seconds, then firmly plug it back in. This resets the connection. Try pressing the power button again once reconnected.
Inspect the power cable for damage. If the cable is frayed or cut, it must be replaced. Contact Hisense support to obtain an official replacement power cable for that specific model.
Also, check HDMI cables and inputs. Remove all cables and reconnect them firmly. Try powering on the TV one at a time after reconnecting cables to isolate any bad cables. Damaged HDMI ports can prevent the TV from turning on.
Step 2: Check for Standby Light or Signs of Life
Examine the front or bottom of the Hisense Roku TV for a small standalone LED light. This is normally red when on standby. If this light comes on, it means the TV is receiving power but not actually starting up.
If there is no standby light, look for any signs of life, like the LEDs dimly lighting up when power is pressed. Faint flickering means a connection problem exists between the power supply and the main board. This could indicate a bad ribbon cable or connector.
If the TV is completely dead with no lights, power, or signs of starting up – the main boards, backlight, or LEDs may have failed. This requires more advanced troubleshooting.
Step 3: Attempt Factory Reset through Roku Remote
If the TV has power but won’t start up, attempting a factory reset through the Roku remote can get it working again.
Here are the steps:
- Press and hold the power button on the remote for around 20 seconds.
- Hold the button until the TV restarts and the Roku logo appears on the screen.
- Go to Settings > System > Advanced system settings > Factory reset once booting into the Roku OS.
This will wipe the TV back to its original factory conditions. Repair the remote and set up the connection afterward. Also, try re-seating the remote pairing cable inside the TV if the remote won’t sync.
Step 4: Check for Bad Ribbon Cables and Connectors
If a Hisense Roku TV has a standby light but won’t fully power on, faulty ribbon cables could prevent startup.
Ribbon cables transfer data between components inside the TV. Over time, they can work loose from the motherboard or break at solder joints due to repeated flexing.
To access and inspect cables, remove the rear cover panel of the TV. Check for any loose plugs or damaged cables between boards. Reseat all ribbon cable connections firmly. Also, examine the power supply board for burnt spots or bad capacitors.
If comfortable soldering, reflow any cracked solder joints on the cable ends or boards. Otherwise, the bad cables need professional replacement. This same process applies to any detached wire cable connectors, too.
Step 5: Replace Defective Main Boards
The internal main boards may need a replacement for a Hisense TV that is completely dead or has backlight problems.
The mainboards include:
- Power Supply Board – Provides power from the wall outlet to all other boards. Sometimes marked as PSU.
- T-Con Board – Controls the LCD panel, backlights, and video signal circuits.
- Digital Main Board – Processes video signals and runs the Roku interface. Also called a motherboard.
These can be purchased online through eBay or Hisense parts distributors. Some key specs, like the board’s model number, are required. An experienced TV repair technician can also source and install replacement boards.
To swap out a bad board:
- Unplug the TV and remove the rear cover.
- Identify faulty board via visual inspection or multimeter voltage testing.
- Disconnect all cables from the board.
- Remove mounting screws to take out the board.
- Install the new board and reconnect the cables firmly.
- Reassemble the TV and test.
This often resolves power problems caused by faulty electronic components. However, only attempt if you have electronics repair experience.
Step 6: Replace Backlights or LED Strips
The backlighting may need repair for Hisense TVs that power on but don’t show a picture.
Modern LCD TVs use LED edge lighting to illuminate the screen from behind. Over time, LEDs can burn out, causing dim or completely dark pictures.
- Remove the rear cover and locate the LED strip along the top, bottom, or sides.
- Check for burnt-out LEDs and replace strips if over 25% are bad.
- Unscrew or unlatch retaining clips to free strip.
- Disconnect the LED strip cable from the power supply board.
- Fit new strip and reconnect. Retest the TV after reassembly.
Similarly, CCFL backlit Hisense models have fluorescent tubes that need to be replaced when showing no image. An experienced technician should handle CCFL repairs.
Step 7: Try a Forced Firmware Update
A firmware glitch may be the issue if a Roku TV powers on but immediately crashes back to standby.
This can potentially be fixed by forcing a firmware update. The steps may vary, but here is one method:
- With the TV off, insert a USB stick with the latest firmware built into the Roku TV’s USB port. Once you identify your model number, new firmware can be downloaded from the Hisense or Roku support site.
- Press and hold the power button for ~20 seconds until booting directly into recovery mode to install firmware from USB.
- Complete the installation process. The TV should reset with corrected firmware if successful.
This process may need to be repeated if the update fails the first time. It can resolve startup problems caused by Roku OS corruption.
Step 8: Contact Hisense Support for Repair Options
If you cannot get the Hisense Roku TV operational after trying these troubleshooting steps, contact Hisense support directly for additional assistance.
You can reach their US-based customer support at 1-888-935-8880 or initiate a live chat session on their website during business hours.
Some options they provide include:
- Further advanced remote troubleshooting and diagnosis.
- Out-of-warranty repair fees or service center referrals.
- Replacement fees for TVs under 1-year factory warranty.
- Local authorized repair company recommendations.
Reporting the model and serial number lets them look at specific repair procedures and options to bring your Hisense Roku TV back to working order.
Many common Hisense Roku TV startup issues can be resolved with the right troubleshooting techniques and replacements.
Key problems to focus on are failed power supply boards, loose cable connections, corrupted Roku software, defective LED/LCD components, and general electronic failures in the TV circuitry.
Utilizing factory reset procedures, installing firmware updates, replacing faulty module boards, reconnecting cables, and replacing backlights are all effective ways to get a non-working Hisense TV powered back on. Contact Hisense support for personalized troubleshooting advice and repair options for your TV model if needed.