I received a .ppt error "Powerpoint was unable to display some of the text, image or objects on slides in the file because they have become corrupted". 

Affected slides (title page in this case) have been replaced by blank slides and they are not possible to recover. 

I already tried to save the file as the same and different name, all my .ppt files have this problem. 

How can I fix this error?

PowerPoint was unable to display some of the text, images, or objects as slides in the file (name) because they have become corrupt. Affected slides have been replaced by blank slides in the presentation and it is not possible to recover lost information. To ensure that the file can be opened in 
previous versions of PowerPoint, use the Save As command and save the file with the same name or a new name. 

The same error message appears when you attempt to open any of the PowerPoint files. The data saved in all the PowerPoint files becomes inaccessible as the above error message can not be surpassed. 

More helpful advices can be found: http://www.filerepairforum.com/forum/microsoft/microsoft-aa/powerpoint/303-my-powerpoint-presentation-didnt-save

Other resolution: 

To resolve the above error message, follow the below mentioned steps: 

1. Click File, then choose Save As. 
2. Save the PowerPoint file at a new destination with the same or a new name. 

In most cases, you will be able to access your PPT files after following the above steps. But, if the above steps are unsuccessful in making the files accessible, then you need to opt for an PowerPoint Repair Toolbox that can repair the files. Such PPT Recovery tool employs high-end scanning and repairing techniques to repair any logically corrupted PowerPoint file. 

This tool does not make any change to the original PPT file, download demo: 
http://www.pptrepairtoolbox.com/

• Marked as answer by PeterChapMan Thursday, October 16, 2014 4:29 PM

Peter,

Although not an answer, where is your backup? Failure to have recent backups result in unrecoverable errors (Murphy's law). I wish all people could learn from this. (and yes, I have triple backups and Murphy refuses to visit me ... :)

Check out PowerPoint file recovery tool, which is an third party tool and repairs damaged PPT files and recover data that has been lost during corruption. Software is available in free trail version, you can explore the features by downloading it here:- http://www.recoverydeletedfiles.com/powerpoint-file-recovery-tool.html

Get PowerPoint Recovery is a professional utility that efficiently and quickly fixes corrupt MS PowerPoint (PPT, PPTM and PPTX) presentations and gets back all the unreadable data. It supports MS PowerPoint 2003, 2007, 2010 and 2013. It can restore several objects like Header/Footer, Tables, WordArt and Charts etc.

More detailed information is here:- http://www.softmagnat.com/powerpoint-recovery.html