[SOLVED] Blank screen in back end but everything runs fine in frontend

NFER-ICT wrote: The server is in-house, so managed by us - with full access.

The server's only job is to host our Joomla sites... nothing else.

So do you actually have an error log from your server?
Does it have anything in it?

stackoverflow.com/questions/6426375/where-can-i-find-the-iis-logs

Hi Nick,

Right, server log found in inetpub/logs/Logfiles shows the following entries for my latest attempts to access the CB User Management screen.

Steps taken: Logged into Administrator, then went straight to Community Builder > User Management

Logs:-

2015-04-13 08:55:14 192.168.17.64 GET /administrator/index.php option=com_installer&view=update&task=update.ajax&eid=700&cache_timeout=3600 443 - 192.168.16.12 Mozilla/5.0+(Windows+NT+6.3;+WOW64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/41.0.2272.118+Safari/537.36 200 0 0 44288
2015-04-13 08:55:25 192.168.17.64 GET /administrator/index.php option=com_comprofiler&view=showusers 443 - 192.168.16.12 Mozilla/5.0+(Windows+NT+6.3;+WOW64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/41.0.2272.118+Safari/537.36 500 0 0 1294

Hope this means something to you because I've not a clue.

Dave

That looks like an access log - you need to find the error log.

Mmmm... we're having problems finding any logs that actually record errors!

I've gone into Server Manager and in Diagnostics > Event Viewer I've set up a new view to catch and show all errors, but attempting to access any of the CB management screens doesn't appear to cause any errors - or at least nothing that is being captured and shown.

I've tried rolling back my version of PHP but that did nothing either.

In Joomla's System Settings, I've looked at the logs specified in the "Path to Log Folder" field, but they just show one failed attempt at logging in the the Admin back end.

NFER-ICT wrote: Mmmm... we're having problems finding any logs that actually record errors!

I've gone into Server Manager and in Diagnostics > Event Viewer I've set up a new view to catch and show all errors, but attempting to access any of the CB management screens doesn't appear to cause any errors - or at least nothing that is being captured and shown.

I've tried rolling back my version of PHP but that did nothing either.

In Joomla's System Settings, I've looked at the logs specified in the "Path to Log Folder" field, but they just show one failed attempt at logging in the the Admin back end.

Sorry, my Windows IIS skills are practically zero.

On other servers blank screens typically mean broken code because of error and such error are typically logged in the server error log.

I've no IIS experience as well so I don't know what to tell you. You'll need to find where the server error log is and see what's going on. As Nick state it's usually due to an error in the code, but it can also be due to memory limits being hit or PHP timeout limit being hit. If you can get xdebug PHP extension installed it might be able to help expose the error on screen instead of checking a log, but it's not guarantee as again I've no IIS experience.