Rockwell Automation 6185-E 20 Inch Flat Panel Monitor Installation - Manual (Page 21)

Industrial 20.1" Flat Panel Monitor 21
Publication 6185-5.2
Interpreting the LEDs on the Control Board
The control board contains five LEDs that are visible through when you
remove the access panel (four red LEDs and one green LED). If the
monitor is functioning properly, the green LED (PWR) and one red LED
(L1) should be lit.
If more than one red LED is lit, then consult the following table to
interpret the status LEDs. If you still cannot fix the problem, contact
Technical Support for additional assistance.
Table C
Interpreting the Control Board Status LEDs
LED 1 LED 2 LED 3 LED 4 Status
X X Screen image control is out of range
(beyond range of Vertical Up).
X X No sync.
X X No vertical sync.
X X Unable to center screen.
X X Problem with Flash RAM.
X X Sync signal has changed.
Note: This combination flashes briefly
any time the screen resolution
changes. A constant blinking cycle of
this combination indicates an error
condition.
X X X Bad power.
X X X Invalid switch combination.