There's your clue. Either do the work yourself or have it done to clean up the vents, heatsinks and replace all heatsink compound. More at link -> http://forums.cnet.com/5208-19681_102-0.html?messageID=3196452&tag=forums06;posts#3196452
I have a Dell Latitude D610. It starts and operates properly for about 15 minutes, then it completely locks up. I have to hold the start button down until it shuts down. When it has cooled down, it will start again. I have checked, and the fan is operating. When placed on a cooling pad, it extends the run time, however it will still lock up. Any suggestions will be appreciated.