Subway blue screened!
Apparently this display is operated by a Windows XP computer which, here, had a hard disk error.
If the person who set up the computer converted this to the more stable Windows file system, NTFS, this probably wouldn't happen unless the hardware it self went wonky.
Here's how to do it from a command prompt if drive C on a Windows XP computer is a FAT32 disk instead of reliable NTFS:
CONVERT C: /FS:NTFS
You're welcome, MTA New York City Transit. Consider this knowledge a gift!