[mschuster91]

At least printers give you some sort of error message.

EDID negotiation or signal integrity issues in HDMI, good luck diagnosing actual causes without highly specialized (and expensive...) equipment.

[npongratz]

> At least printers give you some sort of error message.

Inscrutable, and infamous, though they may be:

https://en.wikipedia.org/wiki/PC_LOAD_LETTER