The steps provided below, try one by one until you solve the issue.
1. Check if the WiFi is switched on
The quick solution here is to simply switch on the WiFi connection option,after that the adapter will start receiving signals from the router.
2. Toggle WiFi off and on [ Redmi Note 9 Pro Max not connecting to WiFi ]
A variety of issues in our smart devices can be simply solved by restarting the functionality again. So if your Redmi Note 9 Pro Max is not connecting to WiFi, which is used with ease the best thing is to restart the functionality. The easiest way to do this is to switch off the WiFi connection on your device and switch it back on for best solution.
3. Restart the device
If restarting the individual WiFi functionality doesn’t worked, the next is restart the device. Restarting your Redmi Note 9 Pro Max will completely refresh the whole cache and solves a lot of issues.
4. Try to reconnecting to the WiFi
If your Redmi Note 9 Pro Max is not connecting to WiFi which is from a single router but works fine on others, the best thing to do is to forget the network and reconnect it.
In this case, go to the Wifi settings menu and find the network you are having an issue with. You can find the forget network option by holding on to the network name, or by clicking on the ‘i’ icon next to it. after forget the network start fresh and reconnect it by entering the password.
5. Take technical help
Always avoid doing such repairs by yourself as it can damage the device. Any kind of unofficial technical help is also must be avoided. Make sure you contact an officially licensed service center to make hardware changes to your device.
Issues with the WiFi Router [ Redmi Note 9 Pro Max not connecting to WiFi ]
1. Do the power of Router on and off (Restart Router)
The most basic but effective solution is to restart the devices. Once you switch off the router wait for a minimum of 10 seconds before switching it back on.
2. Contact the ISP(Internet service provider)
If a simple restart doesn’t work then you should contact your ISP (internet service provider) for all kinds of technical help.Please dont take suggestions from non technical person