Aruba Instant On 1930 24+4SFP: all SFP ports dead after a power outage, LED blinks once and stops

After a power outage an Aruba Instant On 1930 (24 ports plus 4 SFP) still recognised inserted SFP modules but every SFP port stayed down; inserting a new transceiver made the port LED blink once and then nothing. The poster asked for diagnostics or replacement options. Hardware involved: Aruba Instant On 1930 24G 4SFP, 1G SFP modules.

• Hardware: Aruba Instant On 1930 24G 4SFP
• Transceivers: 1G SFP modules
• Form fcator: SFP

Symptoms / messages:

all SFP ports down after power outage
LED blinks once then off