After disassembling the set I think that some of the cabinet problems are due to sun fading. You can see in the picture below that the wood that was blocked from sun is much darker than the rest of the front.
Some other observations of the the cabinet were that some the screws holding in the safety glass seem to be non-original.
One original?
Both non-orignal?
Also the safety glass itself is going to need to be replaced as it's flawed in between the two panes.
