I have a Nokia N800 tablet which was behaving fine until I installed the new software kernel. A few hours later I was getting erratic messages about the internal memory card and now it is greyed out in the file manager and gives an error message "No memory card inserted". The card itself reads correctly on a PC or in the external memory slot. The card is a 1 Gbyte KİNGSTON. Restoring the original operating system made no difference.

Any advice or is this a hardware fault? or a known problem with these cards