S2418HN, power adapter replacement issues

Question

Hi All, Awhile ago we bought a Dell S2418HN monitor for our business (from a Best Buy store - in the US) . A few months ago, someone stole the power adapter. Why they would take the power adapter and leave the monitor is beyond me. In the time since, we have tried at least 5 replacement adapters. The user guide indicates that the replacement part number is either: Delta DA65NM111-00, or Chicony HA65NS5-00 (we have tried both). All attempted adapters are 65W, 19.5V, 3.34 Amp, with a 7.4mm plug. However, in every case, upon power-on (no computer connected) - a message displays:  'please use the adapter that was provided with this monitor' I've tried entering the service tag - but the Dell website finds no match. I cannot get to the OSD to perform a factory reset. I've tried pressing, long pressing, and holding each button at power-up, also every combination of buttons (15 of them). Is there something I am missing? Or something else I should try? Any help is appreciated. Cory

DELL-Chris M · Accepted Answer

* The Dell internal parts page list this for the S2418HN =

- 1XRN1 AC Adapter, 65w, 19.5v, 3 pin, 7.4mm (Delta ADP-65TH FA)
- 6TM1C AC Adapter, 65w, 19.5v, 3 pin, 7.4mm (Liteon PA-1650-02D2, PA-1650-03D2)
- 9RN2C AC Adapter, 65w, 19.5v, 3 Pin, 7.4mm (Chicony A065R039L-DL01)
- GXYHH AC Adapter, 40w, 12v, 3 pin
- K260C power cable, 125V, 2.5A, 1m
- 78390 power cable, 250V, 10A, 1.8m

Just do a google search for the AC adapter Dell part numbers like below =

dell part 1XRN1
dell part 6TM1C
dell part 9RN2C

Monitors

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