I've had my C700 since March 2003. After 12 months of returns to Japan, it was finally fixed in Summer 2004. Worked since util now.
I run Cacko 1.21, a 256mb CF, and a 512mb SD. Last week, went to turn on after it sat for 5 days. No turn on. Soft and Hard resets failed. I tried to get to Japanese Flash menu. Won't go.
I got into Service menu (D+M) ok. I'm afraid of all the NAND stuff, it's not obvious which is a real diagnostic and which will kill the RAM/ROM/FLASH.
I have flashed a new ROM and I have done the emergency restore (C+D with CF card files). No go. I can still get the service menu, but no luck on the Flash menu.
I can get the Boot to Command prompt. and can "cd" around the file system.
Should I try a NAND restore from a virgin JP NAND file on the CF Card? Then restore my CACKO ROM? Will the NAND restore give me back the Flash Menu?
My C700 was great after my 3 returns to Japan (none cost me) for the final fix. I want to get another 6 months out of it.