LCD screen goes blank
I have a MK4S and have an interesting, repeatable problem. On startup the LCD screen appears normal during first half of booting (loading bar advances to about half way, fans startup, etc.) then the screen goes black except for faint backlight and stays in that state. Printer operates and prints normally through Prusa Connect without the LCD being visible. I have verified all connections and if it was a connection issue, it wouldn't consistently come on every time during bootup and then fail at the same point. Prior to firmware 6.4.0 if I left the printer on for at least 1-3 hours, the screen would eventually come on and work normally. Since the update, the screen still comes on during booting and then goes out and will not come back on even after 24+ hours. Only a faint backlight. If I hit reset the screen again comes on right away for the first part of the boot up and then goes black with faint back lighting. Help!