7020 stuck dreamup does not recognise it

need help please guys
got a problem writing image with dreamup v1339 said CRC32 on flash from box not equal local CRC32!!
now when i boot box i get 2 vertical bars and it is stuck,i cant get dreamup to recognize it either,any other ideas lads,it is an original 7020 which i have owned for years and used loads of different images on in the past, i tried the latest pli from their website and this happened