Could be the [https://www.ifixit.com/Answers/View/140554/Low+light+or+no+backlight+on+LCD|this problem.]
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''Can you get Apple to diagnose/estimate what's wrong?'' These are very complicated units.
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''Can you get Apple to diagnose/estimate what's wrong?'' These are [https://www.ifixit.com/Guide/Repairing+Apple+Studio+Display+M7649+Logic+Board/1813|very complicated] units.
''If this answer is acceptable '''please remember to return and mark it'''.''
Could be the [https://www.ifixit.com/Answers/View/140554/Low+light+or+no+backlight+on+LCD|this problem.]
''Can you get Apple to diagnose/estimate what's wrong?'' These are very complicated units.
''If this answer is acceptable '''please remember to return and mark it'''.''