How to revert Master Page from v 3 to v 4 through Power shell command

Hi,

By mistake i set to my customize master page as set as default  the senario is as follows

following is the Custom Site http://mycustomsite/sitepages/mycustompage.aspx i remove site action link from so i use default master page for site action as folllows http://mydefaultsite/sitepages/home.aspx i remember i just change to mycustompage.aspx as default page in Masterpages after that i can not access to myhttp://mydefaultsite/sitepages/home.aspx and aslo if i open the same in sharepoint designer it shows 2007 masterpage instead of 2010.

Any one can help me, Thanks in advance.

Rahul Rashu provide me following solution

Quote

Hi,

Are you able to access the application pages? If yes then add _layouts/ChangeSiteMasterPage.aspx to your site URL and can change the site master page.

I hope this will help you out.

Un Quote

It works fine on my test server, but when I try to open the same page on my live server the Page Open and suddenly close.

Any other way to fix the same through power Shall Command.

Regards

TeeJay

TeeJay