My 2007 24" iMac has developed two faint light brown/yellow horizontal bars across the screen
Is there any point in dissembling and wiping? the discoloration away.
Or are the marks now beyond repair (due to age?)
It's not a user-serviceable part. That said, the browning is probably inside the LCD panel itself, so attempting to clean it probably would't help. Yes, probably due to age.
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