I had to replace my hard drive in my c840 laptop. I am trying to restore the diagnostic utility partition that it originally shipped with. I have read Dan Goodell's page here: http://www.goodells.net/dellutility/
I have created the partition, made it bootable and copied all the files. I can boot directly to the partiton when I make it active and the diagnostic utilities will run just fine, but...when I use the F12 key and choose Diagnostics from the menu, the pre-boot assessment occurs and I then get a message that the utility partition can't be found. I ahve tried making the partition type DE as instructedin the link above as well as type 06. I use partition magid's Ptedit to change the partition type by editing the partition table.This is driving me nuts since I followed all the instructions step by step and have quintuple checked everything. Any thoughts? And yes, I know I can run the diagnostics from the Dell CD. Thanks in advance.