The dreaded Steam Machine 'Red Line of Death' was fixed after a simple CMOS reset

Q: How do I perform the exact CMOS reset sequence Valve described to fix the Steam Machine red LED bar?

Unplug the Steam Machine, tap the power button a few times to drain the PSU, then hold the power button down for about six seconds until the LED flashes and cycles through colors. When it turns green, short-press the power button once to trigger a full CMOS reset. On the next boot a blue LED bar indicates the reset worked, though the boot may take longer while memory retraining runs.

Q: If the red line appears after a firmware update, should I attempt the reset before contacting Valve support or returning the unit?

Yes. The article says it is worth trying Valve's CMOS reset procedure before assuming hardware failure or returning the unit. Valve's recommended steps are to unplug the Steam Machine, tap the power button to drain the PSU, hold the power button for about six seconds until the LED cycles, then short-press once it turns green to trigger a full CMOS reset; a blue LED bar on next boot indicates success.

Q: How long should I wait after the reset for the Steam Machine to finish memory retraining and reach normal performance?

The article says the Steam Machine may take a little longer to boot while memory retraining runs in the background after the CMOS reset, but it does not specify how long that retraining takes. This question cannot be answered from this article.

Q: Does TweakTown coverage indicate any specific firmware versions or updates that triggered the red line reports?

Yes. The article says some users saw the red line after installing a firmware update, and Valve said it looked like a BIOS update that did not fully complete combined with a memory training issue.

Valve's Steam Machine 'Red Line of Death' turns out to be a fixable BIOS glitch, not a dead GPU, as it was just fixed with a simple CMOS clear.

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Hassam Nasir

Tech Reporter

Published Jul 8, 2026 12:15 PM CDT

2 minutes & 30 seconds read time

TL;DR: Valve's Steam Machine "Red Line of Death" error is caused by an incomplete BIOS update and memory training issue, not a faulty GPU. The problem can be resolved by unplugging the device, draining power, and performing a CMOS reset, after which the console boots normally with a blue LED indicator.

Voice: Hassam NasirSpeed

0:00 / 3:06

Valve's Steam Machine has had a rough couple of weeks. It was first criticized for its high price tag and mediocre performance, which even fails to beat a base PS5. Then, scalpers were spotted selling Steam Machine reservations on eBay for more than $3000, calling Valve's queuing system into question. Shortly after the first units were shipped to buyers, reports began to appear about a mysterious "red line" error.

Early buyers started reporting a solid red light across the console's LED strip shortly after setup, sometimes after installing a firmware update, sometimes after just a few minutes of gameplay. Since Valve's own support documentation lists a full red bar as a GPU error, it did not take long for "Red Line of Death" comparisons to the Xbox 360's infamous Red Ring to start doing the rounds.

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The scare started with a Reddit post from user me_hill, who said their Steam Machine bricked itself right after installing an available update, following a short session of No Man's Sky. Commenters jumped in with theories, most pointing at a fried GPU, since the console's graphics silicon is soldered directly to the board with no way to swap it out. That is about as bad as it gets for a $1,049 to $1,349 device that had barely made it into customers' hands.

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The console apparently sorted itself out once me_hill left it unplugged overnight and went through some BIOS-related steps suggested by other users. Valve's official hardware feedback account on Reddit later confirmed what seemed to be happening. According to the company, this looks like a BIOS update that did not fully complete, combined with a memory training issue, rather than a bad GPU.

Valve's fix involves unplugging the Steam Machine, tapping the power button a few times to drain the PSU, then holding the button down for about six seconds until the LED flashes and starts cycling through colors. A short press once it turns green triggers a full CMOS reset. On the next boot, a blue LED bar means the fix worked, though it may take a little longer to boot while memory retraining runs in the background.

The dreaded Steam Machine 'Red Line of Death' was fixed after a simple CMOS reset 3

Frequently Asked Questions

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Question #1

How do I perform the exact CMOS reset sequence Valve described to fix the Steam Machine red LED bar?

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Question #2

If the red line appears after a firmware update, should I attempt the reset before contacting Valve support or returning the unit?

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Question #3

How long should I wait after the reset for the Steam Machine to finish memory retraining and reach normal performance?

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Question #4

Does TweakTown coverage indicate any specific firmware versions or updates that triggered the red line reports?

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Have a question not listed here? Ask below and TweakBot will answer it.

Only a couple of these reports have surfaced publicly so far, so it is hard to say how widespread the issue really is. Still, it is a good reminder that not every scary-looking error light means dead hardware, and it is worth trying Valve's reset before assuming the worst or sending a brand new unit back.