A Steam Machine owner says their system died after only about 20 minutes of use, making it what looks like the first reported Red Line of Death (RLOD) case.
The console won’t boot anymore, and according to Valve’s support guide, the red LED pattern points to a GPU hardware failure.
Since the GPU is built into the motherboard, it isn’t user-replaceable, so the system will most likely need to be repaired or replaced under warranty.
The name “Red Line of Death” is a reference to Xbox 360’s Red Ring of Death.