I've downloaded and installed a fresh install of Odoo V8.0, created a demo database and run various document prints such as the sales order but all documents print as a blank document even though the document shows as 1.2 KB in size.

I've tried various suggestions from other posts which include installing an updated version of wkhtmltopdf, copying the new version of wkhtmltopdf over the other versions, adding to the PATH variable, changing the Output DPI on the Paper Format to no avail.

I've tested wkhtmltopdf and the path and it works.

If the document report types are changed to HTML they output into HTML fine.

Any other suggestions?

Many thanks.