It can be a serious hardware issue if your TV plays sound but displays no picture. Since the display module and sound module process separately on the TV, it is common for a TV to act that way.
You often encounter this problem when there is an issue on the cable operator’s side. However, you may also have a bad backlight or a T-Con board. Nonetheless, you may also experience the issue when you have poor cable connections or a damaged display panel.
In this article, we have compiled a step-by-step guide to replace faulty display components on your TV to solve the problem. So, keep reading!
How to Fix No Picture on TV but Has Sound?
Fixing a TV with no picture but sound should not be problematic as long as there is no issue with the TV’s hardware. Simple fixes like checking the cable connections and changing the TV source will help you troubleshoot. Otherwise, you need to dig deeper and dive into hardware fixes.
Change TV Channel or Source
Since the issue mainly lies on the cable operator’s side, you should first verify if you are facing the same problem on other TV channels as well. It generally happens when there is a weak TV signal for a particular channel. So, change the TV channel and see if the problem persists. Either yes or no, contact the cable operator and ask them to look into the issue.
Likewise, the cable device, i.e., a set-top box, can also be problematic. Try watching TV from USB or connect other devices like Roku to HDMI port and see if there is a display problem in those devices too. you may also connect a PC to your TV via HDMI to know whether it is a fault in the TV hardware or an issue on the source device.
Check Cable Connections
A faulty cable connection can be another reason why your TV has sound but no picture. The issue primarily arises if your TV utilizes an RCA cable. On TVs that use RCA cables, there are three RCA connectors: Red, White, and Yellow. Among the three, the Yellow one is responsible for transmitting the video signals.
Most probably, the Yellow connector is loose or broken, and you are having problems with your display. Please unplug and re-plug the cable to see if it solves the problem. If not, you may also get a replacement RCA cable and connect it.
Troubleshooting Hardware Issues
Since we already discussed the issue as more of a hardware problem than software, there are a few hardware parts on your TV that you need to inspect. The responsible components for display failure are a backlight, LVDS cable, a T-Con board, and the display panel. Here, we will be discussing steps to replace each of the components.
Replacing Backlight Inverter
A backlight inverter is a component on LCD TVs that supplies power to Cold Cathode Fluorescent Lamps (CCFL) on the TV and acts as a light source. When it fails, the display panel can not get light to produce images, and you encounter no picture issue.
