In the absence of any suggestions, I'm reposting more succinctly, and with a clearer subject line. Trying to sort out my partner's MBP 2,2, late 2006 I believe. Have made a Carbon Copy Clone to an external drive, replaced the internal one, and tried to CCC back to the new drive. Screen froze almost at the end of the copy, except for the cursor, which acquired some black lines next to it. Now, whatever disk we try to start it from - internal, external, optical, we get: Grey apple with sundial Blue screen briefly then garbled frozen screen, with cursor visible but immobile. Sometimes the Users login rectangle is partly visible, with 'restart' and 'sleep'. Computer will start in Safe Mode, but still has same black lines next to cursor. It will start in Single User mode. Have started it in Target mode, and reinstalled OS10.6.2 from another (newer) MBP. After install, the newer MacBook started perfectly from the problem machine's targeted drive. I have reset the NVRAM and the SMC, have even tried resetting the firmware by removing one RAM stick and resetting the PRAM 3 times as suggested elsewhere on this forum. Any suggestions? Have attached images of screen on its most recent start-up (it's not always the same) and the cursor with its lines.