Server in question was HP Proliant DL320 G6 from 2010 without any firmware upgrades ever made. Those old versions have multiple known issues, both usability, stability and hardware component compatibility related. Downtime required to perform these steps will be around 3 hours.
Atheros WLAN card on my hack laptop HP nc6000 died sometime ago. No problem I thought as I had unused Intel 2200BG. After swapping card I was greeted with 104 unsupported wireless network device error. While 2200BG was one of original options for nc6000 one I installed had wrong PCI subsystem ID. Quick googling showed multiple people killing their nc6000 after flashing hacked firmware requiring soldering iron and eeprom programming device to recover. Nothing wrong with that and that most certainly has higher hack value, but not for me this time. Since card itself was ok for BIOS I started thinking if I could somehow change ID supplied by card to one HP BIOS accepts...
New HP LaserJets are like Windows PCs. Operating system is bloated and buggy. Recently I had to fix HP LaserJet 600 M602 that said "49.38.03 error, turn power off then on" each time you tried to access network settings via menu - and via ethernet it was completely dead. To fix this turn printer on, press (X) button when all three leds on front illuminate, login as admin, clean entire disk and reload firmware from USB stick.