white screen !!!!

[Eng.Mostafa]

The problem appears to registered members only and when you open any topic page appears completely white .. I do not know what the solution?!?!

with Firefox appears white page
with Internet explore appears (HTTP 500 Internal server error) !!

- Forum: -
http://www.egypthardware.com/vb/forum.php

Membership of the experiment: -
username :test
password :123,456

Forum Version: - 4.1.8

I do the following solutions but the problem still exist :( ...

- uninstall vBSEO .
- I stooped all plugins & hacks .
- make order of repair in MySQL .
- I tried more than Style .
- I stooped all plugins & hacks in Config file .
- disable the HTML GZIP currency (make it on no)
- delete a the folder (includes) and reloaded it again by using FlashFxp .
- reloaded the file newtherd.php

all this solutions dosen't work :(

any one help me please :(

[Disasterpiece]

You should refer to this article first: https://www.vbulletin.com/docs/html/blank_pages

[Lynne]

Other first thing to do is to check your error_logs (if you don't know where they are, ask your host). Then go to the page posted above.

[Eng.Mostafa]

You should refer to this article first: https://www.vbulletin.com/docs/html/blank_pages

I do almost steps but I can't do the steps which talk about bug in PHP !!
don't know what I must do , from where I can find this PHP files to do edit ?!

Other first thing to do is to check your error_logs (if you don't know where they are, ask your host). Then go to the page posted above.

I check the error_logs and didn't found any problem .

[Disasterpiece]

Maybe it's time to consult your hoster for assistance.

If display_errors doesn't solve the problem, most of the time it's something more grave.