crwdns2934241:0crwdne2934241:0 paul

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shadows moving over screen

crwdns2934249:0crwdne2934249:0:

I am having grey shadows move across the screen.  Has been getting worse and sometimes lasts 30-40 seconds

crwdns2866306:0crwdne2866306:0:

Apple Cinema HD Display

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open