[Ikeda, Yamamoto-san]

Yamamoto-san reported that the BS model was dead as of 11:37 on 2021/05/16.
I tried to restart the k1iopbs, k1visbst, and k1visbsp models on 2021/05/17, but
"Cannot run: Expected 1 ADC cards, but only found 0 cards on bus".
The restart failed with an error.
I checked the BS Rack and found that the IO chassis was partially powered down. Some cards were lit up inside.
I turned off and on the power SW of the IO chassis, and smelled burning.
When I checked the inside of the IO chassis, it was partially burnt.
To recover, I replaced it with another IO chassis in the computer room and rebooted the model.

Recovery procedure :
1. Move all the boards in the IO chassis to the same position and connect the cables.
2. Disable Dolphin in K1BS (press !k1bs in sitemap-CDS-Dolphin)
Power off RTPC with shutdown -h now
4. Disconnect the K1BS Dolphin cable.
Connect all the cables in the IO chassis and power on.
6. Start K1BS and make sure everything is working except Dolphin.
7. Shutdown the K1BS -h now and turn it on again, this time connect the Dolphin cable during the boot process.
MEDM confirms that the problem has been fixed.