If you can still establish an online connection (e.g., if you have "Read access" but lost the "Write access" password), you can use TIA Portal to perform a factory reset.
In 99% of cases, the cost of downtime outweighs the cost of the hardware. The most common solution in the industry is to simply siemens s7-1500 password reset
How to Reset a Forgotten Password on Siemens S7-1500 (Without Losing the Project) If you can still establish an online connection (e
Always keep a backup of the TIA Portal project file (*.ap1x) in a secondary location. siemens s7-1500 password reset
the user program and configuration from the CPU and memory card. Critical Reset Methods