Your orange light flashing means that you have not really shut down the computer. You have put it in standby (not sleep) mode.
Press and hold the power button for several seconds. If it still will not shut all the way down, remove the battery and ac adapter.
This is not a good practice but at times, you have no other choice.
Install the battery, and connect the adapter.. then turn it on. I would suggest you let it boot into safe mode. Also, watch the screen as it boots. It will have an option for recovery mode if the drive has a recovery partition. On my HP, it is F11