Problem with blank page without errors

[PaulCastellano]

Hello

I have a problem with my forum. Already login users can use the forum normally. But If you are a guest and try to visit the forum you get just a blank page without any errors.

It started to happen today without any changes on the forum. Does any have an idea what be problem?

[Kindred]

A blank page is a php server crash/error.
You'll have to look at the server error logs.

Probably,  your host upgraded your php. What version of smf? What version of php?

[Doug Heffernan]

It started to happen today without any changes on the forum. Does any have an idea what be problem?

Can you check your server error logs and post here the most recent error messages around the time when the error occurred?