My EP121 has recently developed a sporadic fault which makes it spontaneously close down. This started after I replaced the battery, but this might be a coincidence. Although the close-down can happen without any obvious trigger, it quite often seems to be triggered by flexing or squeezing the lower (long) side. I also wonder if it is heat-related. SpeedFan tells me the disk and cores are running a bit hot: typically 60C and 53C respectively. Thanks for any input.