"bubble" artifacts under screen display

[Karma]

Model 1943 radar display screen shows 19 "bubbles" under the screen glass. This does not currently interfere with target info.
Photo attached.
Is there a fix or repair.
Can I replace the whole display module with any other model like a 1933 or 1833.

 

[Johnny Electron]

NavNet one has only few parts available as the age is now 20-21 years old. You can't buy charts for them anymore. You might consider buying a used Vx2 10.4 fixing the problem and upgrading at the same time.

 

[Karma]

NavNet one has only few parts available as the age is now 20-21 years old. You can't buy charts for them anymore. You might consider buying a used Vx2 10.4 fixing the problem and upgrading at the same time.

Thanks for the reply... did make a purchase on eBay.