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Sharp TV Not Working (Won’t Turn On/No Sound/Picture/Flashing)

It is very disappointing when you invest money in a TV, only for it to stop working. If you have a Sharp TV that won’t turn on, has no sound, has no picture or is flashing, it is more than likely that you can fix the issue yourself. This guide will help you with these common issues so that you can continue using your Sharp TV.

Many issues with your Sharp TV can be fixed with a firmware update or by resetting the TV. You can also check the TV has power, the TV is well-ventilated, the remote is working, all connections to and from the TV are working and that the settings on your TV and connected devices are correct.

TV remote pointed at screen

I will go into each of these solutions in more detail below and explain exactly which settings you need to change to fix your TV. You will also find basic troubleshooting for each issue that could save you time.

Sharp TV Not Working

Male with TV remote in hand yelling

When you are faced with a Sharp TV that is not working, the standard troubleshooting methods include performing a hard reset, a firmware update or a factory reset. You can find how to do each of these below.

Hard Reset

One common issue with Sharp TVs is that they tend to malfunction if there is a power outage or power surge. Performing a hard reset will clear the errors from the TV’s memory without erasing any of your downloaded content or preferences.

Step 1: Turn off the TV and all connected devices.

Step 2: Unplug the TV from the power.

Step 3: Press and hold the power button on the TV for 30 seconds.

Step 4: Wait another 10 minutes with the TV unplugged.

Step 5: Plug the TV and devices back in.

Step 6: Turn on the TV.

Firmware Update

Keep your TV’s firmware up to date to fix any bugs that might occur in previous models of the firmware.

Step 1: Press the ‘Menu’ button on the remote.

Step 2: Navigate to Settings > Support > Check Software Update

Step 3: If a new version of the firmware is available, confirm the installation.

Factory reset

A Sharp TV can be reset to factory settings in one of two ways. Keep in mind that a factory reset will erase all downloaded content and your saved preferences. However, this is the most effective at clearing errors in your TV.

To reset the TV without a remote, follow the steps below.

Step 1: Unplug the TV from the power.

Step 2: Hold down both the ‘Channel Down’ button and ‘Input’ button on the TV.

Step 3: Continue holding these two buttons as you plug the TV back into the power socket.

Step 4: Release the buttons once the TV has completed start-up.

Step 5: Select ‘Factory Reset’ from the ‘Service Mode’ menu.

Step 6: Wait for the TV to restart.

If using the remote, you can access the factory reset through the main menu.

Step 1: Press the ‘Menu’ button on the remote.

Step 2: Navigate to Settings > System/Support/Setup > Factory Reset.

Step 3: Press the ‘Ok’/’Play’ button three times to start the reset, or select ‘Reset’ and enter your TV passcode. This default passcode is ‘1234’.

Sharp TV Won’t Turn On

Female sitting on couch with dog on lap

If your Sharp TV is not turning on, there could be several reasons why. Some common causes include a faulty power cord, a malfunctioning power supply, or a damaged main board. To fix the issue, try checking the power cord for any visible damage, unplugging the TV for a few minutes and then plugging it back in, or resetting the TV to its factory settings.

If none of these are working, work through the possible issues below. You can also try a hard reset, detailed above. Another possibility is that the TV is on but the screen is not working, but you can read more about this issue further down.


TVs will produce a lot of heat, particularly if they are used for extended periods of time. If your TV is enclosed in a tight space and not well ventilated, it ca overheat.

An overheated TV will not turn back on until it has cooled down, assuming no internal damage has been done to the circuit board. To fix this, let the TV rest overnight and clear any nearby obstructions from the vents.

Copyright protected content owner: and was initially posted on June 4, 2021.

Standby Mode

Your TV may also simply be in ‘Standby’ mode. Normally, you can press the power button on the remote to wake it up. However, you can also check that the ‘Main Power’ switch on top of the TV is also switched on.

The ‘Sleep Timer’ function is what puts the TV into ‘Standby’ mode, so if you do not want this to occur, you can turn it off in the settings outlined below.

Menu > Settings > System > Sleep Timer > Off


If you are trying to turn the TV on with the remote, it may be that your batteries need replacing or the buttons are stuck. You can test this by using the button on the TV instead. If the TV still turns on using this button, the remote is your issue.

If you have new batteries and suspect that the buttons are stuck, you can reset the remote by removing the batteries and pressing each button at least once. This will drain any residual power from the remote, allowing it to reset. Make sure you also press the power button a number of times before re-inserting the batteries to clear any built-up debris underneath.

Circuit Board

If none of the above methods are working, it is likely that the circuit board within the TV is broken. Broken capacitors are often the cause of this issue. If your TV is still under warranty, consider requesting a replacement/repair, or you can try to source a replacement circuit board yourself.

Sharp TV Has No Sound

Confused male with TV remote in hand

For a Sharp TV with no sound, you should first make sure that you check the following.

  • The volume has been turned up.
  • The TV is not on ‘Mute’.
  • You are on the correct input channel for your device. For example, selecting ‘HDMI 2’ if it is plugged into the ‘HDMI 2’ port.

If you have checked these simple solutions, you can also try a hard reset or reset the TV to factory settings. However, below are some other possibilities to consider.


Most of the time, the TV will not have sound because the settings on your device or TV are preventing it. The settings on each device will vary, so you may have to look through the instruction manual. However, for a Sharp TV, you can check the following settings.

  • ‘Audio Output’ is set to ‘Fixed’ to use the TV speakers or ‘Variable’ if using an external speaker.
  • The ‘Auto Volume’, ‘3D Surround’ and ‘Balance’ settings are all set to ‘Off’.

These settings can all be found in either the ‘Audio’ settings or ‘System’ settings, depending on the model of your Sharp TV.


Sometimes is may be a loose or faulty wire coming from a device to the TV, or from the TV to an external speaker. Try re-inserting all cable or using a different or new cable instead.

Sharp TV Has No Picture

Female trying to turn on TV with remote

No Picture on One Input Channel

If you have no picture on one particular input channel, it may be that either the connection is loose or the cable is broken. Another possibility is that you are using a cable that is not compatible with the video signal. This is mainly an issue if you are transferring a 4K video signal with a standard HDMI cable.

If you have checked the cable, you should also make sure you are on the right input channel for that device. If it is a satellite TV box, make sure you have tuned the channels.

No Picture on All Input Channels

If your TV has no picture at all, regardless of what channel you are on, there are a number of possible causes. First, make sure the ‘Sleep Timer’ is not activated, as mentioned earlier.

Another setting that will turn off the screen is the ‘Audio Only’ feature. This will turn off the screen whenever you are playing music, and will turn on when you press any button on the remote (except for the power button). You can disable this feature via the following pathway.

Menu > Settings > System > Advanced Settings > Audio Only > Off

You may also be experiencing a hardware issue, such as a broken circuit board or backlight. These issues will need to be assessed and repaired by a Sharp technician.

Sharp TV Flashing

TV remote held up to screen

The most common cause of a ‘Flashing Sharp TV’ relates to the warning light at the front of the TV flashing. This light will flash when you are operating the TV (pressing buttons), or if the TV has an error.

Therefore, this issue can be fixed by performing a firmware update, hard reset or factory reset, mentioned at the beginning of this article. If you are experiencing a flashing screen, please refer to the issues above that relate to your screen not working.

Sharp TV Troubleshooting

If you’re experiencing issues with your Sharp TV, there are several troubleshooting steps you can try. Some common problems include no power, no picture, or no sound. Here are some tips for troubleshooting your Sharp TV:

Copyright article owner is for this article. This post was first published on June 4, 2021.

  1. Check the power: Make sure the TV is plugged in and the power outlet is working. Try unplugging the TV for a few minutes and then plugging it back in.
  2. Check the input: Make sure the TV is set to the correct input source. Use the remote to cycle through the input options until you find the correct one.
  3. Check the cables: Ensure that all cables are securely connected to the TV and the devices they are connected to.
  4. Reset the TV: Try resetting the TV to its factory settings. This can be done through the TV’s menu settings.
  5. Update the software: Make sure your TV’s software is up to date. Check for any available updates through the TV’s menu settings.
  6. Contact support: If none of these solutions work, you may need to contact Sharp customer support or a professional repair service for further assistance.

By following these tips, you can troubleshoot common issues with your Sharp TV and potentially avoid the need for costly repairs or replacements.

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ReadyToDIY is the owner of this article. This post was published on June 4, 2021.

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