I have exactly the same problem with my S2418HN. I had bought it from Best Buy as well. It was working fine for a year. Now it is in black. Does not power up. I have tried your suggestion but didn't work.
Unfortunately, Dell cannot do anything from a warranty perspective.
The purchased 15 month retail Best Buy warranty expired on 3/16/19. Ship date to Best Buy = 11/16/17 Warranty = 15 months Warranty end date = 3/16/19
* Disconnect all video cable from the S2418HN * Disconnect the power cable and power adapter from the wall power socket and the S2418HN * Disconnect the power cable from the power adapter. Wait 2 minutes * Reconnect only the power cable and power adapter to the wall power socket and the S2418HN * Try to turn the S2418HN on
* If still no power, first consider replacing the power cable and power adapter. Just search the internet for the Dell 5 digit part number = K260C Power cable 1XRN1 Delta power adapter 6TM1C Liteon power adapter 9RN2C Chicony power adapter
DELL-Chris M
Community Manager
Community Manager
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54.9K Posts
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August 19th, 2019 05:00
Unfortunately, Dell cannot do anything from a warranty perspective.
The purchased 15 month retail Best Buy warranty expired on 3/16/19.
Ship date to Best Buy = 11/16/17
Warranty = 15 months
Warranty end date = 3/16/19
* Disconnect all video cable from the S2418HN
* Disconnect the power cable and power adapter from the wall power socket and the S2418HN
* Disconnect the power cable from the power adapter. Wait 2 minutes
* Reconnect only the power cable and power adapter to the wall power socket and the S2418HN
* Try to turn the S2418HN on
* If still no power, first consider replacing the power cable and power adapter. Just search the internet for the Dell 5 digit part number =
K260C Power cable
1XRN1 Delta power adapter
6TM1C Liteon power adapter
9RN2C Chicony power adapter