Re: Hardware Courses for iSeries

Roberto,

That was a switch on the communications ports cover. Required outside of the US, but in the US they removed the power check switch.

There's a story about Larry Bolhuis, Tom Jarosh, then General Manager of AS/400 division at an IBM Soundoff session at COMMON. It seems Mr. Bolhuis was describing the procedures to check a communications failure. One of the instructions was to open that door and put a wrap plug on the port and then run diagnostics. Note: at the time if you opened the communications access cover door, it dropped power to the entire chassis. Oopsy (as Larry would put it) Mr. Jarosh's reaction was legendary and had IBMrs diving for the floor under chairs/tables whatever they could find to get away. Finally Frank Soltis stepped up and explained why that switch was there (for good reason outside the US) and why they thought it was important. The next day and engineering change went out for all US based machines to remove that switch. Mr. Jarosh did not mess around, and he was a very good General Manager for the brand. The world lost him in October 2008.

Jim Oberholtzer
Chief Technical Architect
Agile Technology Architects


On 10/3/2013 12:08 PM, Roberto José Etcheverry Romero wrote:

but i do remember
an old 720 or similar that had switched that turned off the power if
you attempted to remove the BACK cover!