Question About "Sleep Mode" On My Windows XP Tablet/Laptop
my laptop goes into a "sleep mode" if it sits for a while without being used. usually i just move the mouse, which turns on the screen, and i log back in. when it's idle, the light next to the power button blinks slowly so you know that it's on. just recently it's started to "lock up" if it stays in the sleep mode for too long. the laptop is still on, but the light by the power button stays on instead of blinking and i can't do anything to make it respond, with the exception of holding the power button and shutting it off, then restarting it. does this sound like a hardware issue or software? otherwise, everything seems to work just fine.
this is the tablet/laptop that i have:
fujitsu lifebook t4215
i appreciate the help!