RED LED ON My Book Duo

Hello,
Since this morning, my MyBook Duo 8to displays 3 red LEDs on the front panel, continuously (whether it is plugged in into the mac or not). I can’t access or test the disks. I don’t know what to do. The current configuration is Raid 0. What do you advise me to do ? test the disks outside their case ? (which implies a purchase). Thank you in advance for your answer.
update: I don’t have a separate disk reader, but note that if I remove the disks (or leave only one), the result is the same, the 3 leds light up. Could it be the box and not the disks?

/FR/
Bonjour,
depuis ce matin mon MyBook Duo 8to affiche 3 led rouge en façade, en continue (qu’il soit branché ou non). Impossible d’accéder aux disques ou de les tester. Je ne sais pas quoi faire. La configuration actuelle est du Raid 0. Que me conseillez vous de faire ? tester les disques en dehors de leur boitier ? (ce qui implique un achat). Merci d’avance de votre réponse, bien à vous

update: je n’ai pas de lecteur de disque indépendant, mais à noter que si j’enlève les disques (ou que je n’en laisse qu’un), le resultat est le même, les 3 led s’allume. Serait-ce le boitier et non les disques?

As the My Book Duo drive is not accessible, please refer to link bleow:

Title: Windows or macOS Cannot Find My Drive
Link: Cannot Find My WD Drive on Windows or macOS

In order to test the drive, we would request you to install and WD Drive Utilities and run the test:

Title: How to install WD Drive Utilities( For both Windows and MAC)
Link: Error

WD does not recommend to remove the internal drives from My Book Duo enclosure.