Some gridlines disappeared

[C_S_M_S]

I am trying to add boarders to a workbook and it works on all cells bar D47 amd D49 where the right gridlines have disappeared on the workbook. No other gridlines have disappeared. I have inserted a column, deleted column D and hidden the column but it remains in column D or if I hide the column it jumps to missing in column E which is visable!

I have checked the colour of gridlines on worksheet via options. I have removed all boarders on workbook via formatting. I have changed the colour of the boarders to black and fill to 'no fill'. I have cleared all conditional formatting but nothing has brought the gridlines back.

Can anyone help? Thank you in advance

 

[C_S_M_S]

Please ignore - i have found the problem - it was a problem in column C where text had been written in white and was clearing the gridlines