Devialet warranty term is 5 years. Did you got this issue after warranty expired?Even Devialet don't repair their circuit boards, they only offer replacements. I had an issue with my D220 pro; It was the worst customer service I've ever received, period.
Luckily for me i bought it from a first rate dealer who offered me a full refund even after 3 months and subsequently dropped Devialet due to the shear arrogance of the responses we'd both received.