Oh, you mean that one. Anyway, do you have any idea about this issue that I could try prior resorting to last option, which is to call a service technician.
You have the link, you are the only one in this thread providing firmware links, I did not need to because you already have the latest firmware
I may not totally agree with you that the USB port may be the source of corruption, unless we can run a diagnostics. Some circumstances are fine like "Printing via USB" and a few pages (approx. 10 to 20 pgs) "Scanning to USB" even consecutively (utmost < 3 to 5 files). More than that, the machine would reboot by itself.
The firmware I linked fixed that problem in the software, if yours is still doing it then the USB port must have an issue that is causing corruption, you would need a service technician.
I was able to upgrade the firmware successfully using Altboot procedure. However, the issue still not resolved. When i scan to usb, the machine reboots automatically by itself. Do you have any idea on this matter?
can you assure me that I will not get into trouble that would lead to a total unusable machine?
I can tell you it is very unlikely, and in that case, the other method via USB, or the other one I can tell you via PM will resurrect it (The machine, not your settings) anyway. But it's a computer you are dealing with, I cannot guarantee a flawless install, anyone who tries to say anything with 100% certainty in the electronics industry isn't worth listening to.