Eureka! Power Supply!
I decided to take a look inside the PS can. I disconnect the power plug. Then as soon as I began removing the PS I heard something making a rattling sound. I found a piece of loose plastic (?) inside the PS box. I was very, very careful. Minimum contact. I laid it down and got a bright light and large magnifying glass. After examining components I finally found it. The solid piece I found covers about 75% of a hole in a package. I did find smaller pieces.
Last mystery. Help me figure this out. I am wondering what this is that allows the PS to continue working. Is this some protective device gone bad? Visible through the opening: there appears to be a solid connector between two round points with one end blown out. These two points seem to be directly above the inner leads labeled "AC." BTW, the fuse was not blown.
The damaged component has 4 leads. No part number - blown away. The outside leads are labeled + and -. The two inside leads have the label "AC" between the leads.
I mentioned protective devices because this power supply has Built-in Triple Protection: Over Voltage Protection, Over Power Protection, & Short Circuit Protection. I suppose they all do. This one also has thermally controlled fan speed.
Here are the specs on the PS (HPC-300-101/EN-8304946):
http://www.enlight.co.th/PSU300.htm
http://www.highpowersupply.com/product-ps-hpc300101.htm
In this pix it is the dark object just to the right of the cap. It is about 1/2" square, 1/4" thick.
http://computer.howstuffworks.com/power-supply.htm
This pix has a similar layout but lacks this particular component which is located in front of the nearest cap.
http://computer.howstuffworks.com/power-supply1.htm
Sorry I couldn't provide digital pix - all the installed software to extract the images are on THAT machine. :-)
Thanks,
janusz
