Two of my sites, they simultaneously index was white.
in this site, after login, when we want to enter Panel admin, Does not permit entry and exit from the site provides.And again we must enter.
And when, we entered username or password incorrectly, Page is white.
Or when we click on the link out, page is white.
Debug mode is enable.
But does not display any error
my xoops Version: 2.4.4

1= fxarya.com


2= cancerouschildrenmehr.com
The second site, the site closed

thanks for your answer.
Who wants to help me?

lets try checking the database tables.

1= Check if the user table (or any table) needs to be repaired.

FAQ:How do I check and repair my database?

List of user tables so I.C.M.S I've import to XOOPS database.

did you check if a table needed a repair?

also if you haven't done it yet. run the checksum script that comes with that package.

could be a permission issue or different table schema issue? (but you would have probably gotten a permission error if the permissions were not set)

This Image Shows some of the relations and tables.

Ah, the infamous 'white screen of death'.

It means that the program is crashing before it can complete.

My site did that for some unexplained reason for about 2 hours a few days back (http://www.ladads.info).

It was right after I installed the DokuWiki module.

Unlike previous installation errors, where it stayed broke until a problem was found, it entually cleared itself up without modification.

While I had the site in debug mode, I still could not get beyond the 'white screen'. The other user was able to get the debug error. What he read to me was that the 'database could not be found'.

So in that particular case, I believe that the problem was caused by a service outage at the vendor.

Previous white screens have been caused by incorrectly installed modules; which were repaired by going into the database and turning on the 'debug' mode manually and then fixing the installation problem.

{HEY, CAN WE GET A SCRIPT THAT DOES THAT?

IT COULD USE THE XOOPS DATABASE ACCESS PRIVILIGES AND BE USED TO SWITCH THE PREFERENCES OF THE SITE SO WE CAN TURN ON THE DIFFERENT DEBUG MODES.

THEN THE USER DOES NOT HAVE TO MANUALLY GO TO PHPadmin AND MANUALLY MAKE THE CHANGE.

DON'T KNOW HOW YOU WOULD PROTECT THE PROGRAM FROM MALICOUS USE...}

Another white screen was caused by a crashed data table. I had to manually rebuild the table to get the site to work again.