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Heads up display - not working


New member
Danbury CT
Buick Ownership
I just bought an 04 Rendevous 120 k miles. Not a big need but it would be cool if the heads up display worked - I adjusted knob all the way up for brightness - I assume - and I can hear movement when I press the up or down position button - but nothing appears on the windshield. Does anybody have this issue? Easy as a fuse somewhere, etc? Please advise.