All,
I just bought a busted BK 2831E on Ebay. Looks like the PO exceeded the input voltage rating and burned up a high-precision metal film resistor. It's burned up so bad that I can't read one of the color bands...
Everything around it checks out OK - no high resistances, no blown caps, no burnt traces, etc. Unit boots and operates fine other than this input resistor.
As I can't find a service manual for the thing... anybody mind sending a pic of the inside of their unit so I can see the color bands? It's the three blue 1W metal film resistors up by the input terminals. Measured values would be even better

Thanks!