Cambridge Audio CD Player Has Died


I have a Cambridge Audio Azur 840C CD player that is roughly 15 years old. A year ago the left channel went dead & was subsequently repaired. However, yesterday the audio output completely died (no sound whatsoever). Although the unit has served me well, I am reluctant to continue to put more money into repairs of an older unit.

That being said, I have a question for those of you who have more expertise than I. Is there a discernible difference in sound quality between high-end CD players & those more moderately priced? Although I do have a high-quality audio system, I would prefer not to spend a lot of money on a new CD player unnecessarily.
Thank you so much.
Kit
kitjv
Just so that I am educated on this subject, is it correct to say that a stand-alone CD player is essentially a DAC + a transport? Sorry for the remedial question.
Kit
basic CD Player is DAC and Transport,  sometimes  also include streaming and digital in/out...many believe there are inherent low jitter advantages in an all in one player...
Thank you. As soon as I decide what option I want to pursue regarding the replacement of my CD player, I will seek your recommendations. Many thanks.
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Is there an method to determine whether the problem lies with the DAC or the transport that I can do myself?