I think it may be because gaming on a phone can cause the CPU and GPU to over-heat, I have had this experience a lot and it is just over-heating, you may need to give it a break once it gets really bad and let it cool down or the phone could have damage from too much heat.

Hello! Here is one guide I have found on YouTube if you wish to do it yourself: here, also if you wish to not do it yourself you are going to have to take it to a repair place in your local area such as Best Buy to get them to fix it for you. Note: Make sure you have the right tools for the job such as the ifixit Pro Tech Toolkit or something that will work.

Hello, if you are wanting to replace the screen you have two options, you can take it somewhere in your local area to get someone to fix it, or you do it yourself, if you want to do it yourself I suggest watching YouTube videos first to see if you can do it, here is an example video for that kind of phone: https://www.youtube.com/watch?v=sWOgEDYZ..., and if you don't already have tools get tools like ifixit Pro Tech Toolkit, and make sure to get the replacement screen you will be installing such as the this amazon product, if you need anymore help or want to provide more details feel free to ask anytime!

I will try to answer this the best I can, here are some YouTube videos that can help you replace the LCD screen if that is the problem, here is a YouTube Video on how that works for a Techno Spark 6 Phone: https://www.youtube.com/watch?v=9GiIYOlV..., but if you can give us more information on which phone model it is, we can help you a little more. Also would like to mention, that this is what you would need to do if the following happens on the screen: To check if you need to replace your LCD screen, look for visible cracks or chips on the screen surface, dead pixels (small, persistent colored dots), discoloration or unusual patterns, flickering, lines appearing across the display, areas of the screen that are completely black, backlight issues, distorted images, or any physical damage that impacts the screen's functionality; if you notice any of these, it might be time to consider a replacement.

May need a screen replacement, but before anything, I will research and add another comment later. Update (10/23/24): (1) Check connections (2) Make sure the monitor is securely plugged in and the video cable isn't damaged. You can also try using a different cable. (3) Test the display (4) Connect an external monitor to the computer and restart it. If the external monitor works but the computer screen doesn't, you can try updating the BIOS, graphics driver, and CPU chipset. (5) Check for a corrupted graphics driver (6) You can try rolling back the display driver or adapter in Safe Mode. (7) Perform a hard reset (8) Unplug the power cord, remove the battery, hold down the power button for 30 seconds, and then reconnect the power cord. (9) Check for physical damage (10) Look for damage to the HDMI, DisplayPort, or USB Type-C port on the computer. If the port is damaged, try using a different port. (11) Check the power source (12) Make sure the computer is connected to a power source and the power light is...