![iMac Late 2009 - Bluetooth and USB keyboard and mouse do not work on Big Sur installation screen · Issue #43 · barrykn/big-sur-micropatcher · GitHub iMac Late 2009 - Bluetooth and USB keyboard and mouse do not work on Big Sur installation screen · Issue #43 · barrykn/big-sur-micropatcher · GitHub](https://user-images.githubusercontent.com/71452954/93491704-65a69480-f8e0-11ea-9189-99137ad51833.jpg)
iMac Late 2009 - Bluetooth and USB keyboard and mouse do not work on Big Sur installation screen · Issue #43 · barrykn/big-sur-micropatcher · GitHub
SOLVED: What causes “snowy” display on iMac screen after replacement - iMac Intel 27" EMC 2546 - iFixit
![screen - iMac doesn't start, all i see is colored lines and then checkered lines on a white background - Ask Different screen - iMac doesn't start, all i see is colored lines and then checkered lines on a white background - Ask Different](https://i.stack.imgur.com/nr6xr.jpg)
screen - iMac doesn't start, all i see is colored lines and then checkered lines on a white background - Ask Different
![Strange iMac screen failure with a white border around the image - #12 by sub - TidBITS Talk - TidBITS Talk Strange iMac screen failure with a white border around the image - #12 by sub - TidBITS Talk - TidBITS Talk](https://talk.tidbits.com/uploads/default/original/2X/1/119bdab002a13feec4efd20b16be486783ae231b.jpeg)