As far as I know I am the only one that knows this little trick. Hope it helps someone out there.
If you do a search in Google for the following terms..."WordPress White Screen of Death", "Blank Screen of Death" or "WSOD" you will see that MANY people have this issue of going to their Wordpress Login screen only to discover that it is completely blank.
So next time you try to login to wp-admin and you get a BSOD (Blank Screen of Death) simply do this...
Download the now discontinued Flock Browser. I have version 2.6.1 installed. Simply open this browser and go to your Wordpress /wp-admin page as you usually do. You will see, that for some reason, this browser will NOT show a blank page. Instead you will see your normal login page, although your login box will not be aligned as usual. Enter Username & Password and you're in.
I have had many Blank wp-admin Screen issues as I do allot of work in Wordpress for clients and so far I have a 100% success rate in getting in and solving this issue using this simple trick.
Once I am logged in I will start to deactivate one plugin at a time. Each time I deactivate a single plugin I will reload the wp-admin page in Firefox to see if the login page shows up now. When it does show up again in Firefox then I know that the plugin I just deactivated was the culprit.
Off course I cannot know if it will work for everyone every time, but for me it works.
Now you don't have to waste your time editing your functions.php or your wp-config file, or any of the many suggested solutions that only seem to work some of the time.
I would appreciate your feedback if this worked for you or if it did not.