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.
If you are reading this, chances are you are standing in front of a legacy machine running an Omron NT20S, NT31, or NT631 HMI. The screen is blank, the PLC is running, but you can’t make changes because you don’t have the NT Series Support Tool software. omron nt series support tool download
If you need the standalone version (often labeled NTST v4.8 or v4.7 ), you will not find it on Omron’s public website anymore. You will find it on industrial automation forums like PLCforum.uz , MrPLC.com , or various file archives. If the screen is dead, consider replacing the
The official modern equivalent is CX-One . When you install CX-One V4 or V5, it includes the "NTST" (NT Series Support Tool) as a component. If your company has a support contract with Omron, this is the safest bet. However, a new license costs hundreds of dollars—steep for a one-off repair job. If you need the standalone version (often labeled NTST v4
Because this software is old and requires a serial number, many "cracked" versions online contain malware. Always scan any downloaded .exe or .zip with VirusTotal before running it.