@CoachAlex 

TP-Link is not in the business of making customers jump through hoops to get replacements, but a few conditions do need to be met. 

1.  TP-Link must troubleshoot the product with the customer.

2.  A manufacturer defect must be determined by support

3.  The product must be within its warranty period as specified in our warranty policy. 

The Archer C5400 router has a limited 2-year warranty, as does any Archer or Deco series product.  Even if you get a copy of your receipt if it was purchased in 2019 it would be out of warranty and a replacement would not be possible.  Support will work with you to troubleshoot and resolve the concern but if the product is really defective and can only be resolved with a replacement, that is likely not something that will be possible as it is now 2024 which would put the product at least 3 years old and a full year out of warranty.