Image retention on Thunderbolt Display


yesterday working in illustrator on thunderbolt display , when moved canvas noticed faint shadow on grey background. ran checkerboard retention test, , after 2 min (!?) showed retention. have never heard image retention on thunderbolt display.

normal?
 

image persistence in ips led display normal , image should dissipate after few minutes. if taking longer 5-10 minutes panel may bad. checker board test 3 minutes, full grey screen 1-2 minutes. try not @ screen more few seconds during test. after 1-2 minutes of grey screen take @ display. should not able make out checkerboard shadowing @ time. if can make out shadow panel may defective.

how long have had display? if it's under year old repair can done under apple limited warranty @ no cost you. if display on year old , don't have applecare looking @ $850-$900 replace panel.
 


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