When you try to login in to wordpress dashboard only a blank window opens (white screen of death) (even your blog homepage opens a blank window).
Don’t be panic!,This is due to the “php memory limit “ .(low memory )

WHY THIS HAPPENS
This is may be due to these reasons
- may be your are using too many plugins
- default “php memory limit “ provided by your current hosting provider is too low
- you are using too many ads or no cache plugins installed
The main problem is may be with the plugins installed .follow this tutorial to disable all plugins without login to wordpress dashboard : http://www.faqspedia.com/how-to-disable-plugins-without-login-to-wordpress-dashboard
HOW CAN I INCREASE MY php memory limit
To solve this issue you can submit ticket to your hosting provider ,to increase your “php memory limit “.and the problem will be solved soon. If they not yet solved your problem ,better you stay away from your current hosting provider,am currently using Hostgator for my wordpress hosting needs .I am pleased with there service.you can move from your hosting to hostgator for free.
I faced this problem several times after installing some plugins. Whenever that occur I login to my FTP and manually remove the plugin files. Then the problem is solved.
Thanks for the post Shyam.
oh thanks man for this tip.
So far I haven’t experienced this problem so it looks quite new to me. Anyway the stuff u have covered is interesting to read.