Roger Harman wrote:
Google & the IBM Info Center are your friends....
http://lmgtfy.com/?q=ibm+e4a+front+panel+shutdown

What Larry said. The VERY FIRST thing I did was a Google search on a variant of what you proposed, and my results were precisely as Larry described.

Larry wrote:

1) Set the system mode to Manual
- Up arrow to 2, then Enter
- Up arrow to A, B, or D with M
- Enter until back to 02.
2) Press the Power (White) button until I saw 0?
3) Release and then press the Power button again to confirm that I wand the power off.

On an E4A, the LIC load source (A/B/C/D), the mode (M/N), and the P/non-P IPL all cycle separately. And I was frantically trying to cycle the mode to manual, but between the dim light, the tiny LCD, and my increasingly presbyopic eyes, I couldn't tell that the mode was cycling between "N" and "M." I went back to the front panel this morning, and tried cycling the mode again, and even with decent light, it took me several cycles before I could see that it was in fact cycling between M and N.

And Rob, NO, NEITHER of the two Linux boxes in the room, NOR the WinDoze box, are HMCs. They're all servers. And yes, shutting down everything that could open a terminal session on the E4A was an incredibly stupid thing for me to do; it was in the heat of shedding battery load. And no, Rob, I've personally only even USED a Keypunch or a card reader a few times, when I had a summer job at my old high school, during a brief period when they had a local timeshare system (McGill University MUSIC 4 running on a 4341, with no capability for submitting batch jobs [or otherwise accessing the line printer] from a terminal). The last time I even SAW Hollerith card equipment in use was at the Computer History Museum, on my Spring vacation, when I made an extra trip from San Francisco to Mountain View just to see a demonstration of their restored 1401. And I don't think I've ever even seen a plugboard for a plugboard-programmable unit record machine, much less wired one.

We did have the UPS cabled to the UPS monitoring port in the past. Unfortunately, that caused a few problems of its own.

--
JHHL

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