The idiot who was IT manager before me and got fired got 4 off-lease HP-Compaq lay flat cases. They're purposely designed with an L-shaped PSU so you "have to" get one from HP. One failed and smoked and sparked up our conference room pretty good. Another blew out in reception. They wanted like $90 ea so for both, I put a standard ATX PSU outside the case and ran the cables in. But HP thought of that! The fan in the PSU is powered by a loopback cable from the PSU that hooks up to a 3-pin fan controller port on their rigged custom motherboard. So now every time we turn them on, they beep angrily and you have to hit F1 to bypass the "no PSU fan" warning. It is not disablable in the BIOS (even Dell's can do that!). Absolute bullshit.
So really, their enterprise products are giant boxes of scam and they're scam artists for selling those atrocities. Out of all the PC's my other company has sold in the last 9.5 years, 1 has had a hardware failure. Guess who we're buying the rest from. I would not touch a personal or business product they make every again for any reason.
Oh and out of the 4, 3 had hardware failure since we got them 1.5 years ago. I just swapped out a hard drive in another one with a 64GB Vertex 4 SSD
it's really fast but thaaaaaaanks so much for that custom, one of a kind rail system for hard drive mounting. That helped a lot! Assholes.
Oh btw when shopping for printers, an ultra high end Xerox's TCO after 5 years was $31,000. HP's somewhat mid level was $68,000. Awesome.