Hi Leetai
Sorry to hear your experience.
I have the M DAC + also for the past 6 years until recently changed.
Good DAC.
Is sound still coming out from the unit when trying to play something?
Could it be just the display is gone?
Problem is without the display you would not be able to tell what source you are locking, what filter using, and volume (if you use the preamp function).
Good luck getting it fixed.

未過保養就攞返大昌行修理幾個月,過咗保養就一係買嗰部一係畀出面師傅修,總代理嘆慢板,師傅亦唔掂！

聽聽下歌突然之間聽到有 pop 一聲之後就變成這樣了 有燈著冇display https://upload.review33.com/images/202404/202404182244359172.jpg
睇個fuse冇事 機箱入面四條fuse都是正常
請問除咗維修仲有冇其他方法 ？？？？？