I use a Pa3515 with XP Professional. There is a problem when the accumulator goes to low level and the notebook goes standby mode. If I press the power button the PC goes to normal mode but the display does not switch on, it remains black. If I switch the PC by hand (Fn+F12) to send standby mode the problem does not occur (but it does not work for the earlier case). It can bee quite dangerous in a bad situation.
Thank you for your help.