during power-on self-test (post), four-digit checkpoints display, indicating the progress of the testing. if an error is detected that requires attention, the server halts with an eight-digit error code displayed in the upper row of the operator panel display, starting in the leftmost position. this eight-digit error code identifies the error. for a listing of the error codes, see the eserver pseries 670 service guide.
the four-digit checkpoints are in the form of nnnn, where n is an alphabetic or numeric character.
the following diagram shows the locations of the operator panel display and components of the operator panel.

1 power on/off button
2 power on/off led
3 operator panel display
4 reset button
5 service processor reset button (service use only)
6 disturbance or system attention led