Anleitung zum aufspielen des Usb images für hs7810a (octagon 1008 SE +)

[mondeo]

Hello,
I'm having a strange problem with my friend's 1008 SE+.I have installed several versions of HDMU image for the 1008 SE+ and had the same problem with all of them.After a few working hours we get black screen while on the VFD we can see the messages L6.26, SCAN, Ld, boot, Load, run, HDMU but there is no signal on tv.After replacing the two files root.img and ulmage on the usb the box works again.Surprisingly this happens only when the box is at my friend's house.I kept it at my house for a week and it worked fine.
Any ideas?