UPDATE:
As pointed out by SBDP_4.0 you could use C:\KRC\SmartHMI\SmartHMI.exe to restart the software.
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I've got a strange problem on two of the eight robots I have at a clients warehouse.
The SmartPAD would suddenly close or crash the SmartHMI and just leave me with the bare Windows 10 desktop.
Q: Is it possible to boot the SmartHMI again, from the Windows desktop, without restarting the controller?
A: Yes, see update above this.
I've tried unplugging the SmartPAD by pressing the top button and pulling out the cable leaving it for 2 min., but it just boots up with the same screen as attached.
KRC4
KSS 8.6 & 8.7 (Two different robots, running almost same setup.)