I haven't seen anyone mention the MZ-M100, and I've noticed the service manual isn't available here, so I took the liberty to order one. Should be here within a week. I just used the 800 number in this forum, and the total cost is only $11.53 after taxes and shipping. So... if anyone else was wondering about this HiMD unit, we'll soon have some of the answers. I inquired if there was a document that described the service mode and the representitive told me that this book describes a test mode, but wasn't sure if that was what I was looking for... *shrug* ***EDIT*** I can't seem to figure out where I'm supposed to upload the service manual to? I scanned it to a PDF (including all of the schematic sheets).. comes out to about 20MB. Definitely high enough res to print back out. I'd like to share it, but... where?