r/SteamDeckModded

Saw a few posts here discussing similar ideas, which reminded me of this old project, so I figured I’d share it. I’m planning to pick it back up and continue working on it.

I started this project back in 2022–2023, but it ended up being put on hold in the later stages and has been sitting ever since.

The original approach was to reverse-engineer and bypass the ANX7580, break out the internal eDP signal, and use an eDP-to-MIPI bridge to drive the display. Later on, thanks to the open-source BIOS work from the DeckHD project, I found that modifying the eDP panel parameters in the BIOS could also get the screen working. That turned out to be a much cleaner solution.

The goal was to make the whole device as compact as possible. Basically, the original Steam Deck motherboard is the only major part I’m keeping. The controls, battery, and cooling system all need to be custom-made.

Compared with a standard Steam Deck, I removed the left trackpad and the right analog stick.

Specs:

• Battery: 4×18650 cells, 4×3500mAh
• Display: 5.5" AMOLED, 1280×720
• Custom cooling module with two fans — one mainly for the CPU, and the other to help circulate air and cool the internals overall.

I replaced my analog sticks with elecgear tmr sticks. Swapped the battery to 53wh and installed the clicky button mod. Everything works after having to reseat the flex cables because the right stick wasn't inserted all the way.Issue is that the steam deck is acting like the battery isn't connected.

There's no battery icon and when I press the power button it flashes as if it's empty. It works when i turn it on via charger but there's no percentage or battery info in the command. I have pushed the connector in all the way. can't think what the problem would be. I've also went in and out of battery storage mode a few times to see if that does anything. Right now i have drained the battery and I'll try charging overnight.

EDIT: just playing games and noticed that the fan is way quieter than usual, probably not being provided enough power?

Did a shell swap inspired by the EVA 01 from Neon Genesis Evangelion. Only unfortunate thing that happened is that my audio board got damaged, but otherwise, Im very happy with it considering I mostly use my bt earbuds and dock for home gaming most of the time. Also added a custom boot up video that I got from a decky plugin.

These are used steam decks I customized. They’ve got clicky kits, Hall effect sticks, soldered colored sticks, painted vents, 2tb ssds in each, and 1-2tb micro sds in each.

The lcd deck has deckHD and a 32gb ram upgrade. But I’m not taking credit for modding that one I just found it online while looking for the other decks.

Bit of a passion project.

The only thing left that I might do when I find my clear carbon fiber film is cover the trackpads because I prefer the grip over both stock and extremerate textures.

Guys, please just take your time with the screen, especially on the sides.

Hello everyone , I’ve been working on this Steam Deck Top for the last 2 days, it snaps together like LEGO! You just slide in your portable monitor, 60% keyboard of your choice, your Steam Deck dock, a USB hub, and even a little spot for your portable mouse just for the fun of it.
Let me know what you guys think!
And keep in mind, I have ZERO experience with 3D modeling. I designed the whole thing in Tinkercad!

ifixit are the official partner with valve for rapair

Finally done with this first customized build. It took me long enough lol. 😂 I have one or two more tweaks and I think it will done with modding it.

Hi everyone,

I’ve released an experimental Decky LSFG-VK plugin that brings the current lsfg-vk v2 developer build to Steam Deck / SteamOS users.

Release/download:

https://github.com/eugeniosegala/decky-lsfg-vk-experimental/tags (download the latest tag)

A bit of context on why I made this:

As of 30 July 2026, the public Decky plugin’s lsfg-vk build is 140 commits behind the latest upstream "develop" branch (this is mostly because lsfg-vk, which is also the library used by the Decky LSFG-VK plugin, hasn’t released a new version in a while, keep in mind that I'm using a develop build).

This experimental plugin instead packages the reviewed, checksum-verified "lsfg-vk 2.0.0-dev28" developer prerelease of the engine lsfg-vk (released a month ago). It is not a rolling download: each plugin release pins and verifies a specific upstream archive.

In my own testing, I’ve had very good results:

- Noticeably less ghosting in some games; in a few cases it is barely noticeable.

- FP16 (new option) can improve performance on supported AMD GPUs.

- I suggest starting with Performance Mode disabled. Performance Mode is faster, but the full-quality mode in this v2 developer build looks substantially better than lsfg-vk v1 in my testing.

- That said, this is still a developer build. Some games may regress, fail to attach, or simply work better with the public/original plugin. Please test it game by game.

It is designed to coexist with the original Decky LSFG-VK plugin. The experimental version has its own private install, config, and wrapper, so you can keep both installed and choose one per game:

- Original/public plugin: "~/lsfg %command%"

- Experimental plugin: "~/.local/bin/lsfg-vk-experimental %command%"

Use exactly one wrapper per game; do not combine them.

Huge thanks to Kurt Himebauch / xXJSONDeruloXx for the original Decky LSFG-VK plugin, and PancakeTAS and contributors for lsfg-vk. This is an independent experimental fork, not an official.

Full repo: https://github.com/eugeniosegala/decky-lsfg-vk-experimental

I’m also working on a completely new plugin using a new frame-generation model for Linux/SteamOS, so keep an eye on the repository! 🙂

A few months ago I had the idea: "The steam deck motherboard seems pretty small. I wonder if you could make a steam deck the size of a gameboy?"

Well, it's not done yet, but the SteamBoy is coming along great! It has a fully functional LCD steam deck motherboard, battery, speakers, and all the face buttons you see here. No custom PCBs needed (so far), and all within the dimensions of a Gameboy.

The only thing left to get working is the screen, but this is a much harder task than any of the other parts. The screen I'm using is a 1200x1080, 90hz AMOLED panel, originally intended for VR. To make it work, I need to make a custom adapter PCB between the steam deck ribbon cable and the display. I also need to mod the bios the same way that DeckHD and Deck Sight do.

For cooling, I got a small 30x7mm fan and heatsink from AliExpress and 3D printed a custom mount for them. It actually works surprisingly well! After undervolting by -50mV on the cpu and gpu, it could keep temps in the 70s for Tunic, and temps in the 80s for Clair Obscur. Not bad for such a tiny fan!

I'll probably make a follow-up post as well went I have new progress to report. Let me know what you think!

EDIT: Check out my follow-up posts!

SteamBoy demo video: https://www.reddit.com/r/SteamDeckModded/s/wy7Ufqaxat

SteamBoy teardown: https://www.reddit.com/r/SteamDeckModded/s/MxIi5vXqRc

Finally, here is the much-anticipated teardown of the SteamBoy! Hopefully now it makes sense how it is possible to fit everything in. See the picture captions for details.

Let me know if you have any questions! This will also be my last SteamBoy post for now until I have more progress to show.

Just doing a quick little demo of the SteamBoy (main post here), since people wanted to see it in action. Teardown coming soon!

Hey everyone! I could really use some help diagnosing an issue with my Steam Deck LCD.
I recently did a full shell swap. After putting everything back together, the Deck booted normally and the internal display, touchscreen and sound were all working perfectly, but none of the controls were working (except Power and Volume).
I opened it again and removed/reconnected the motherboard and ribbon cables to fix the controls. The good news is that all the controls work now, but after doing that, the internal display stopped working.

Current situation:
Steam Deck boots normally
All buttons/controls work
Sound works
HDMI output through a dock works perfectly
SteamOS still detects the internal display
Internal LCD has no picture
Touchscreen also doesn’t work
I’ve already disconnected/reseated the display connectors several times

The internal display was 100% working immediately before I removed/reconnected the motherboard, so I’m wondering if I damaged the LCD ribbon/flex cable while working on it. The shielded display cable was originally pretty firmly stuck down, and after manipulating it several times, some of the adhesive/shielding started coming loose.
Has anyone had the same combination of symptoms? Could a damaged LCD flex cable cause both the image and touchscreen to stop working while SteamOS still detects the internal display?
I’m thinking about replacing the display flex cable before assuming the LCD itself is damaged.
Any advice would be really appreciated! 🙏

Got this gorgeous controller today. Can't wait for it to charge up so I can use it with my personal Steam Machine build.