JeanC
The keyboard lock does not put the PocketBook into a sleep mode, it only locks the keys so that it cant accidentally turn a page etc. To save power turn it off. You mention you did turn it off but then it lost power anyway. The only way thts possible is if it was somehow turned on. I have found one way this occurs.
If its off when you are sliding it in the pouch it is very easy to inadvertently turn it back on with a slight touch of the power button. You wont notice its on because its in the pouch. Its possible the same has happened to you. What setting do you have it at for turning off automatically?
The LED problems seem to be a bug as well as some other issues.
Try this new firmware
http://pocketbook-global.com/downloa...ketBook602.zip
1.unzip the file
2.transfer the swupdate.bin file to a micro sd card
3.make sure your 602 is off
4.put the micro sd in the 602
5.hold both the forward and back page buttons down and turn on the 602
6.when the device starts the update process let go of the page buttons.
7.follow the prompts on the display to plug in the device to power and click the OK button when it asks.
i believe it will deal with most of the issues you have faced. among the other fixes the device will remember the last page you were reading now and also use that last page as the "boot up" image (provided you choose that option) so you can begin reading while the device is still turning on.