Validating sharepoint site server down

Scenario:
We work with an external environment and once in a while it goes down. As we don't really have access to login we inform our admin's to help us regain access.

But it can be a false positive also. So here's are quick steps before we conclude site is really down / in-accessible.

Solution:

1. Check for home page [ if 404/broken, try next step ]
http://intranet.contoso.com/SitePages/Home.aspx

2. Check for any layouts page in the site collection [ if 404/broken, try next step ]
http://intranet.contoso.com/_layouts/settings.aspx

3. Check for Site Pages library if team site [ if 404/broken, try next step ]
http://intranet.contoso.com/SitePages/Forms/AllPages.aspx

3a. If you can see all pages validate Entry page exist with no issues

4. Check for Pages library if publishing site [ if 404/broken, try next step ]
http://intranet.contoso.com/Pages/Forms/AllPages.aspx

4a. If you can see all pages validate Entry page exist with no issues

5. If you had access to any other site collection / web application. Try steps 1-4 for new url.

6. Ping the box to make sure server itself is not down.

Other things to keep in mind :

Usually any page marked as Home Page can't be deleted. But just in case you see it missing. Check Recycle bin once to validate if page is not deleted by some one.
http://intranet.contoso.com/_layouts/recyclebin.aspx

In case page is accessible but broken with weird error and if you have owner rights, you can look into webpart maintenance page to get some insite
http://intranet.contoso.com/SitePages/Home.aspx?contents=1