I got given a old 360 3 RROD turned out to be the power cable thats all

1 XTREME Sec Master
2 XTREME Sec Slave
When i turn off the drive and press 1 for the ten secound count i get this, Port 970 Master/Slave a0 so i tried on 3 diffrent Pc`s same. So i bought a x360 usb kit....tired of taking my pc apart allso. So just tried to flash it and guess what same this the read does not start at all.... I can leave it 10 seconds or upto 15 seconds does not start to read at all.
any info would be great in the meentime i`ll trawl the forums some more

*Edit would it help trying to swap usb ports with the X360 ??*