|
15.700 bytes |
Service Hints & Tips |
Document ID: DDSE-3QKLRS |
PC Server 720 - Light emitting diodes/LCD's
Applicable to: World-Wide
Light Emitting Diodes/Liquid Crystal Display
Light Emitting Diodes
The following is a list of the front operator panel light emitting diodes (LEDs) followed by the definition for each LED.
Color Indications:
Green = proper operation
Yellow = alert condition
|
LED Number |
Definition |
|
1 |
Hard disk drive activity |
|
2 |
DASD error |
|
3 |
Processor Complex Error |
|
4 |
Color green (POWER GOOD) |
|
5 |
Color green (POWER Enabled) |
|
6 |
Color green (All subsystems good) |
Liquid Crystal Display
The Liquid Crystal Display (LCD) on the front operator panel contains a 2-line by 16-character LCD (front panel display) driven by the 80C752 microprocessor. The front panel display receives and transmits ASCII characters. The LCD supports the upper- and lower-case ASCII character set.
Errors detected by the computer might be displayed on the LCD and/or on the standard display attached to the computer. This is helpful when a display is not attached to the computer or the attached display is inoperative.
|
Search Keywords |
| |
|
Hint Category |
Hardware Maintenance Information | |
|
Date Created |
20-08-96 | |
|
Last Updated |
30-09-98 | |
|
Revision Date |
29-09-99 | |
|
Brand |
IBM PC Server | |
|
Product Family |
PC Server 720 | |
|
Machine Type |
8642 | |
|
Model |
| |
|
TypeModel |
| |
|
Retain Tip (if applicable) |
| |
|
Reverse Doclinks |