Adaptec AHA-1740A - Manual (Page 46)

The following table lists the LED flash codes with the associated
failure descriptions.
Flash Code Failure Description
LED Remains On Host Adapter Control Processor failure. Terminators
inoperative, missing or not powered-on or the card
enable has not been asserted after reset.
1 flash RAM test failed.
2 flashes AIC-6251 SCSI protocol chip verification failed.
3 flashes FIFO write/read data path test failed.
Continuous flashing EEPROM has not been programmed (AHA-1744 only).
If any of the flash codes occur, turn the computer system OFF, re-
move the host adapter and inspect it for physical damage. En-
sure that the EPROMs are correctly installed and firmly seated,
there are no missing or damaged components, there are no broken
wires, and no conductive debris is on the host adapter. If no
physical damage is found, return the AHA-1740A/1742A/1744 for
repair to the dealer or distributor where the host adapter was
purchased.
The host adapter is cleaned and inspected and tested using a
burn-in period before it is shipped. Exercise caution when han-
dling the host adapter and keep it in the protective, conductive,
wrapping until you install it. With these simple precautions, you
can avoid most of the host adapter failures and damage can nor-
mally be avoided.
Problems Detected During Installation
This section may be useful to correct problems related to
installation.
If the system will not boot from the floppy diskette drive after
initial hardware installation, the following items should be
checked:
Table 7-1. AHA 1740A/1742A/1744 LED Flash Codes
adaptec AHA-1740A/1742A/1744
7-2