Note: There are three Product Guides for the x3750 M4, as follows: The Lenovo System x3750 M4 (machine type 8753) is a 4-socket server featuring a streamlined design, optimized for price and performance, with best-in-class flexibility and expandability.
By opening Airport Utility, I was able to see the problem with both: out of date firmware. The utility has a little button to click to update it.
Except, I would get this: Of course, I web searched everywhere trying to figure it out.
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Withdrawn from marketing: The models covered in this product guide are now withdrawn from marketing.
The replacement system is the Think System SR850 which is described in https://lenovopress.com/LP0645.
The slots are as follows: Up to two hot-swap redundant AC power supplies (80 PLUS Platinum certification).
Standard models use 900W supplies; available 1400W AC and 750W DC options.
Dedicated mezzanine LOM adapter slot for a choice of 2-port 10 Gb E (RJ45 or SFP ) or 4-port 1 Gb E controller.
One port can optionally be shared with the IMM2 management processor.
The x3750 M4 provides maximum storage density, with flexible PCI and 10 Gb Ethernet networking options in a 2U form factor.