Thank you for contacting Pocketbook Customer Support and your photos.
In order to solve the problem, we recommend you following the below described steps.
1. download the firmware located under the following link:
http://download.pocketbook-int.com/T...fault_user.zip
2. install it according to the manual placed here
http://www.pocketbook-int.com/downlo...ook-602-en.pdf
3. check the functionality of the device when operated by this firmware version
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So this is older firmware with video driver update. It helped, but I would like to know is there a way to clean old firmware video driver cache.