Some time ago I bought a Dynax 7 from eBay in Exp+5 conditions. The camera had a almost illegible rear display (among other issues) so I tried to fix it. Here I'm posting some information, in case someone needs to do the same repair.
First of all, the display originally looked as follows:
Reading a bit about LCD displays, reveals that most likely a birefringend compensation layeres is present between the liquid crystals and the polarization filters. The compensation layer had most likely gone bad. I tried to remove the front polarization layer and scratch off the compensation layer. The display changed color and got darker, but it became well legible even without compensation layer:
Using acetone and cotton swabs I completely removed the full compentsation layer:
After mounting a new polarization layer:
Comparing to a pristine Dynax 7:
Overall, the display changed color and is not as bright as it was but it is now again very well legible. In case you plan to perform the same repair a few notes: The display is sensitive to pressure, I damages mine a bit, also acetone should be kept away from the contacts as it might damage them, so use almost dry cotton swabs and avoid touching the contact area.
First of all, the display originally looked as follows:
Reading a bit about LCD displays, reveals that most likely a birefringend compensation layeres is present between the liquid crystals and the polarization filters. The compensation layer had most likely gone bad. I tried to remove the front polarization layer and scratch off the compensation layer. The display changed color and got darker, but it became well legible even without compensation layer:
Using acetone and cotton swabs I completely removed the full compentsation layer:
After mounting a new polarization layer:
Comparing to a pristine Dynax 7:
Overall, the display changed color and is not as bright as it was but it is now again very well legible. In case you plan to perform the same repair a few notes: The display is sensitive to pressure, I damages mine a bit, also acetone should be kept away from the contacts as it might damage them, so use almost dry cotton swabs and avoid touching the contact area.
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