Sansa e280 v2 very long startup and memory error?

I have problem with my player, when i turn it on or connect to pc then appear sandisk logo and freeze for about 4-5 min. then start, but i cant add any file to my player, cant record anything, cant format. I try access to recovery mode but when i connect to pc (this two plots on board are bridged when connect) and run dmesg in a terminal i always get this (click on image to enlarge): 

I try tricks with remove battery, force MSC mode but nothing helps. If you have any idea what to do please help me.