I have a small pc repair shop and we have been open a few years. Recently our repairs have been picking and we are almost always able to find and resolve the computer's problem; however, I feel like there is probably an all inclusive tool(s) needed for every bench. I am not sure what that is, so I thought I would ask. This answer may be available in other posts or threads, but I wanted to ask again because things change so quickly that the answers to this questions last month might be different today.
My main idea is I want to find something that will quickly test hardware for problems or failures. I typically do part swaps looking for failed hardware when I suspect that to be the issue. Over the past few years we have purchased various tools that are used specifically for bench repairs, but I know there is a all in one package. I have looked at PC-Doctor's tools offered at http://www.pc-doctor.com/product_listings_technician.php
I am not sure if there is something better out there or not, but I am sure that there is no better place to get recomendations for this since many of the posters here have or work on a bench. I have found many answers here that has saved me a great amount of time. In fact if I don't know the answer from the start or I want to see if my thoughts on something is right EE is where I go.
Please let me know the "kit" or collection of kits that you could not live without.