Inspiron 7500 hinges

Question:
Inspiron 7500 hinges
hi all,
I've had horrible problems with the hinges on my inspiron 7500.. they seem to freeze up and break the back cover... about once a year.
anyone had any experience of this?
is there a way to fix it without replacing the back cover and hinges once a year? any way to oil the hinges or fix them in some other way?
anyone got any suggestions?
thanks in advance...
-Rob
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