Do you suspect that your laptop's video cable is not working properly? Loose wiring can cause intermittent interruptions in the video function, especially if the laptop system or screen panel is pushed while the computer is operating. If your equipment is still covered by the warranty, contact the manufacturer for help. After all the covers and screws are replaced, reconnect the battery and turn on the laptop. If all is well, you're good to go.
If the screen doesn't work, remove the covers and check that the ends of the cable are securely connected. If your laptop screen still doesn't work, you may need to take it to a computer repair shop. Not all computers have a separate video card. It's easy to tell if your computer does it.
If the monitor cable is connected to the computer in the same area where all the other cables are connected, then the computer does not have a separate video card. On the other hand, if you monitor Lead Plus on your computer in an area away from other cables, you most likely have a separate video card. In addition to looking for replacement parts, releasing the tabs on the plastic case without breaking them is often a difficult part of repairing a laptop. My laptop screen works, but the touchscreen capability has disappeared and my laptop doesn't detect it, after replacing the power port.
In addition, if you have a laptop and you have a separate video card, you can only access the video card if you disassemble the base of the laptop. Some laptops are similar, but others are completely different, so you might want to search the Internet and see if anyone has posted a video on how to replace the screen cable on your laptop model. Compare the age and replacement value of your laptop with the cost of repairs before trying to find and repair what's broken. Knowing how to tell if your laptop's video cable needs to be replaced or repaired can help you save time and money.