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Troubleshooting
4-4 Issue 1 June 1998
Table 4-1. LED Power up Sequences
LED Sequence Description
No LED blinks Error with hardware or AC
adapter.
First blink:
Red or Green
LED is not functioning properly
as units should blink Yellow.
Yellow EPROM Checksum test failed.
Faulty EPROM or Board
problem.
Yellow & 1 Red SRAM, Data test failed
Yellow & 2 Red SRAM Address test failed
Yellow & 7 Reds & 1 Green Passed all hardware tests