If you run the diagnostics on the blade when the adapter is working and passing traffic, does it still show EEPROM fail? Or does that only show when the adapter stops passing traffic?
If the failure comes and goes, you'd probably be best off replacing the blade (unless it's an add-in adapter, in which case only replace that)
When the adapter is working and passing traffic all tests are ok. EEPROM doesn't fail.
I mentioned before that the leds keep blinking after the adapter fails but i was wrong, the leds stop blinking and only the orange one remains lit up continuously.
I'd recommend replacing the hardware, then.