i try putty for bootlog using serial cable(mini usb ) but when i turn on dreambox it make my laptop to shutdown

thank you mimisiku may be this is the cause , i will send it for repair.

so with pli and openATV and hd freaks boots but with empty tuner problem and with original img ,dream elite , merine didnot boot and stop at logo flashing red light

l already download and flash original img from dreamboxupdate.com/ after flashing dreambox 520 did not boot and stop at dreambox logo flashing red light so i reflash again pli and same problem then i flash HD freaks also same problem (empty tuner) i flash dream elit and merine but stop at logo and did not boot

i have problem in dreambox 520 hd it suddenly stop working and blinking red i flash new img open ATV 6.1 during flashing it gives cannot read CA consider updating rescue loader and after flashing dreambox empty tuner A and B and also cannot recognize usb stick or hard disk i update rescue loader to 103 but still same problem what is the cause and how to solve?