Tablet reboots after sleep mode.

[lynx]

Hi,

I am a newbie here, but I work in a "corporate" enviroment which uses thinkpads exclusively . I currently have a X41 tablet that seems to go into sleep mode after several minutes then after any key is pressed it will reboot .
The mobo has already been replaced and bios, embedded controller and hard drive firmware all updated.
Due to the unreproducible nature of the problem, PC Doctor has not reported any errors .
I suspect the RAM would be the next "logical" FRU to replace.

Any thoughts , all input greatfully received .