twh;After reading your post, I have to make a few comments!
When I returned to the first tenant's office, he told me that he couldn't turn his computer on and had lost all his data. I asked how he could tell it was lost if he couldn't turn it on, and he told me that he checked from another computer in the office.
ANY Networked Computer that is shut down will appear as "gone", when trying to read its drive from another Computer on the same Network (physical LAN + Work group).
It's "simple logic"
If the Machine is not there, it's not there!!!
Did the Client give an answer regarding a restart of the "affected" Machine, or simply / conveniently change the subject?
Now he says that he had a technician fix the computer and recover the data and the technician tells him that I damaged his computer when I checked the voltage. He denies that he was using a laptop, and demands that I pay for the technician.
This claim requires accurate, credible documentation.
Ask to see the reports from the Tech.
Verify the claims on the reports with the Tech, in the presence of the Client.
Ask the Tech if it is possible to damage the Power Supply of the Machine, by connecting another Peripheral Device to the same Circuit, while that Machine was powered down!
Any answer other than "No" is 100% Bull Poop!
More likely what the Tech worked on was another Machine, with a failed SMPS, and the failure was unrelated to your scenario.
Another possibility is the "Dead" Machine was always dead - long before you arrived.
Because I used a Fluke meter, shouldn't he take this up with them?
That would be the best line of red tape to send Him towards, but the Fluke people will first likely respond with a disclaimer, placing the liability on you.
In my opinion, this guy may be over analyzing the way things fail (Best-Case Scenario), and is simply over reacting due to his ignorance of technical things.
If this is the case, reasoning may bring this Person back to reality.
Unfortunately, I would have to predict this Client is the Worst-Case Scenario type: looking for someone to blame + pay for any failed piece of Equipment.
pdh:
Or he was running a defrag when he powered it off to make sure people didn't see his porn collection.
LOL to the Porn collection!!!
Seriously, this is a valid point; if the guy powered down a Machine during a Defragmentation routine, this would affect the data in some method.
Depending on what was being "shuttled around the tracks" at the time, it may lose simple user data (like documents, etc.), or the loss could be a driver.
Definitely would not lose MBRs, as these are marked "Unmovable" and are not included in the defrag actions.
I will end here.
Any responses to the information I have posted here are welcome.
Let us know what has taken place so far.
Scott