If the screen is dead, consider replacing the unit with a modern NS series HMI (which uses CX-Designer) rather than trying to resurrect a 25-year-old laptop with a serial port.
Omron officially discontinued this tool years ago in favor of the CX-One package (which includes NTST). However, finding a working download that doesn’t come with a virus is a nightmare. omron nt series support tool download
Finding and Using the Omron NT Series Support Tool (Windows 11/10 Guide) If the screen is dead, consider replacing the