I'm hoping someone can help me with this please. I recently sent the above tuner abroad. Before doing so I checked it was working and in good order. It was worked my perfectly in every respect. However, having received it the buyer says the display is weak both in full brightness and dim mode and needs replacing, which I must admit rather surprises me given I checked this prior to sending.

If the display is weak can the display tube be replaced? Is the part needed still available? If so any suggestions where I can get it from and how much it would cost please? The buyer is in Canada and claims the tuner is now junk. 

Any advice would be gratefully received.