The reseller will do nothing.

* If you purchased the monitor by itself, Dell will provide a 3 year warranty starting from the manufacturer date embedded in the monitor 20 digit alphanumeric serial number. So if the reseller had it on their shelf for 6 months, you only get 2 1/2 years of warranty. This is the price you pay for not buying the monitor directly from Dell
* 24" and smaller Dell monitors do not get a service tag number so you cannot "register" them using the Dell online tools
* Because you purchased the monitor by itself from a reseller, you must follow these instructions
* Save the invoice from the store
* If you ever need a monitor replacement, you will need to contact Customer Service via phone (not Technical Support) for your country
* You will provide to them via email or fax a picture or PDF of the original invoice showing us the purchase date, and your information. If you lose the original invoice, we will not warranty the monitor
* You would provide the following data to the Customer Service representative if you ever need a monitor replacement within that 3 year period derived from the 20 digit alphanumeric serial number:
Brick or Online Store:
Monitor model:
Monitor 20 digit alphanumeric serial number:
[Your]
Email address:
Name:
Shipping address:
Phone number:
Operating system:
Video card:
Video card ports tested:
Issue:
Troubleshooting performed:
* Monitor Factory Reset done
* Monitor failed Self-Test and Built-in Diagnostics
* Post further troubleshooting