Hi@Shozer,

Thank you for reporting your issue to community.

Did you remove the powerline system and test the network on the router separately? 

For your issue,please try the suggestions below:

• Change the powerline adapter location: Try plugging the adapter into a different circuit (such as a socket in a different room) to eliminate circuit interference;
• Check the router's DHCP lease time. If it is 12 hours, you can change it to 24 hours for comparison;
• Check whether the router and powerline adapters have reboot schedule;
• Turn off the powerline adapter's power saving mode:How to enable/disable power saving mode on powerline adapters

Hi@Koushik7788,

We understand your eagerness to solve the problem. The engineering team has received your complete case information and is currently conducting a comprehensive analysis based on the device operation log and usage environment data. Since the causes of similar faults in different models of equipment may vary greatly, engineers need to conduct special troubleshooting based on the characteristics of your equipment, which may require more professional testing time.

To ensure the efficiency of problem handling, it is recommended that you communicate with engineers through a dedicated email channel. If you have new information to add, you can send it to the engineer by email, and the engineer will give priority to it.

Considering the topic classification characteristics of the technical discussion area, the troubleshooting solutions for different models of equipment may be different. Centralized communication channels will make it easier for engineers to focus on your case, and it will also help other users quickly find solutions for the same model. Thank you for your cooperation in information collection. We will continue to provide high-priority support for your problem-solving.

  @Tristen89,

If you have more information, please add it to the post you posted, so that we can focus on your case. It is not recommended to repeat your problem in other posts, because centralized communication channels will be more conducive to engineers focusing on your case.
The causes of similar faults in different models of equipment may vary greatly. We need to conduct special inspections based on different equipment characteristics to help users quickly find solutions for the same model.

Hi@Tristen89,

We welcome enthusiastic users to help each other in the forum. We have some cases where some enthusiastic and technically knowledgeable users provided good suggestions.
I think you misunderstood me, or I didn't express it correctly. Please forgive me if it offends you.

Just for your question, because I want to focus on or follow up on your case, but your reply is not concentrated in one post, it is difficult for me to collect information and follow up.

Shozer mentioned that the problem can be solved after the powerline extender is removed. Is the extender you mentioned also a powerline extender? Or a range extender?
If it is a range extender, is the model 850RE/855RE/854RE/860RE/RE105 one of them? Is the specific problem that the range extender causes the client connected to the main router to have no internet?
If it is one of the models, then we can basically judge that your problem is inconsistent with Shozer's problem. We have the firmware of the range extender to solve this problem.

I suggest you start a new thread at https://community.tp-link.com/en/home/forum/32, and I will follow up on your case individually. If you have more details, you can also provide them to me in your thread, which will also help us work together to solve your device problem.

Thank you for your kind understanding and cooperation.