Sharepoint Failure

I have a client who has (had) Intranet site, recently a outside programmer was trying to install his web app and changed some settings and the Intranet site started coming up as Directory Unavailable. I have no Sharepoint training however I went to the "Sharepoint:80" menu in IIS and changed it's directory to a different Virtual Directory and now the Intranet site comes up. However the Timecard program and the announcements now come up as "Web Part Error" What do I need to do to get these apps working again? Screenshot
Ethan WilsonAsked:
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psv1973Connect With a Mentor Commented:
Can you have a look in Central admin diagnostic logging. did the location of the log get chnaged?
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psv1973Commented:
These errors mean that your page wants to use a web part (read a dll) and within your application this does not exist. Can you reload the page and then post the latest SharePoint log (12/Logs or 14/logs for SP 2010). The errors in there should give some more idea as to which dll is missing.
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Ethan WilsonAuthor Commented:
Where do I find these logs? (I am not sharepoint trained, but this client is paying me to do this).
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Ethan WilsonAuthor Commented:
Also...this sharepoint doesn't show up in central administration...this sharepoint was made by their previous IT admin with no documentation left over.
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psv1973Commented:
It sounds like you're in a difficult situation. You migth want to consider getting an expert in. Even though I'll do my best through EE to help you fixing this might be tricky.

Best to find out first what the problem is related to.

The logs are in:
C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\LOGS or C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\LOGS depending on if you have SP2010 or SP 2007

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Ethan WilsonAuthor Commented:
I see "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\" but from there the numbers are different. I have a 12, 40, 50, 60
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psv1973Commented:
12 it is then for a SP 2007 system
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Ethan WilsonAuthor Commented:
All of the LOGS are empty and the earliest one is from 3/17/2011
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Ethan WilsonAuthor Commented:
I am looking for a log to use
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