Laserjet 2015n powers up for 2-3 seconds - but no lights come on - and then it powers down.

Hello,

Please perform the following.

Super NVRAM initialization Turn off the printer.

1. Press and hold the Go button.
   
2. Turn on the printer and continue to hold the Go button for at least 50 seconds. During this process, the Attention , Ready , Go lights turn on. Then the Attention and Ready lights turn off, leaving only the Go light illuminated.
   
3. Release the Go button. The Go , Ready and Attention lights turn on.
   
4. Press and hold the Go button. All lights turn off. During the next three seconds, the Go , Ready and Attention lights turn on in that order, one per second.
   
5. Release the Go button to perform the initialization. The control panel lights begin cycling from front to back. After the Super NVRAM initialization process is complete, the printer returns to the ready state.