Dear Eng. Ayman

h r u

i am ahmed nasr 

i work in elsewedy cables 

from my pleasur to contact you, 

In my case just help apply this method to reset firmware and return to normal hmi work.

https://support.industry.siemens.com/cs/document/109744950/usb-recovery-(reset-to-factory)-mode-for-2nd-generation-basic-panels?dti=0&lc=en-WW

spotip

Did everything as described in the paragraphs but after turning off the HMI for 10 seconds, the OS load does not start. What to do ?<

 Hello,

You should reset the panel to factory setting.

See section 6.7.5 of the following manual: 

https://support.industry.siemens.com/cs/nl/en/view/90114350

hi

the related site that you mentioned is not opened please send your inform in anothet way