How to test a Valve Index for dead pixels
The Index is PC-tethered, so the test runs on your desktop and gets mirrored into the headset:
- Open the dead pixel test tool on your PC and make it full-screen.
- In the headset, open the SteamVR desktop view (or Virtual Desktop / OVR Toolkit) and maximise the browser so each eye sees the solid colour. View the panel through the sweet spot — the Index's dual-element Fresnel lenses blur toward the edges, so move your eyes, not just the image.
- Cycle white, black, red, green, blue, and grey. A dead pixel is a fixed dark dot; check each eye separately by closing one at a time — the Index has two physical panels, and a defect exists on only one.
- For a quick sanity check without a browser, the SteamVR "room view" grey environment works as an improvised uniform background, but solid colour screens are far more revealing.
If the dot is coloured rather than black, run the stuck pixel fix tool positioned over the defect for 15–20 minutes — the Index's fast-switching LCDs respond to colour cycling as well as any desktop LCD.
Dead pixel, mura, or dust — telling them apart on the Index
Index owners report three look-alike issues, and only one of them is a dead pixel:
- Dead pixel— sharp, fixed dark dot, same spot in one eye on every background. At 1440×1600 per eye under Fresnel magnification it's small but crisp — most visible on white loading screens and snow/sky scenes at 144Hz or any refresh rate.
- Mura / backlight grain— the Index's LCDs show a faint "dirty screen" texture on uniform mid-greys, especially at high brightness. It's diffuse and shifts with brightness; a defect with no fixed sharp edge is mura, and it's characteristic of the panel, not a fault.
- Dust behind the lens— the Index's lens assembly is not sealed, and dust between lens and panel is the single most common "dead pixel" false alarm on this headset. Dust appears soft-edged and slightly out of focus, and its apparent position shifts as your eye moves off the lens centre. A dead pixel stays locked to the image.
The two-panel design is diagnostic gold: close one eye, then the other. A panel defect exists in exactly one eye's view. Anything you somehow "see" in both eyes at the same spot is your eye or the content, not the hardware.
Valve dead pixel warranty — what's covered
Valve sells the Index through Steam, and hardware support runs through Steam Support:
- 1-year limited warranty from delivery (US and most regions); 2 years in the UK/EU under consumer law
- Manufacturing defects including dead pixels are covered; Valve support has a solid reputation for replacing defective HMDs and individual components (the headset, cable, and controllers are serviced as separate parts)
- Claims: help.steampowered.com → Hardware → Valve Index → describe the issue; attach a photo taken through the lens against a white background
The catch is age: the Index launched in 2019 and was sold into 2024–2025, so coverage depends entirely on your purchase date in your Steam order history. Second-hand units carry no transferable warranty. For how other current headsets compare, see the Meta Quest 3 warranty guide.
Fix options for an out-of-warranty Index
Out of warranty, the Index is actually one of the more serviceable headsets:
- Stuck (coloured) pixel— colour cycling first, always. It's free and works often enough on these LCDs to be worth two attempts.
- Dust behind the lens— fixable: the Index's lenses can be carefully removed for cleaning, and iFixit hosts teardown guides. Use a blower, never a cloth, on the panel itself.
- True dead pixel — no software fix. Replacement panels are not sold separately by Valve, so the paths are a used donor headset, third-party VR repair shops, or living with it — a single off-centre pixel on a headset used for active PC VR is genuinely tolerable for most people (see the immersion impact guide).
- Storage rule — like every VR headset: never leave the lenses facing sunlight. Focused sun burns LCD panels in seconds and turns a one-pixel problem into a dead headset.
FAQ
Does Valve replace the Index for a single dead pixel?+
In-warranty, Valve support has a good track record with documented display defects — a clear photo through the lens against a white background is usually enough. Valve publishes no minimum pixel count; claims are evaluated individually through help.steampowered.com. Out of warranty, Valve does not offer paid panel repair — used donor units are the realistic hardware route.
Why does my Index dead pixel only show in one eye?+
The Index has two separate 1440×1600 LCD panels, one per eye. A panel defect physically exists in only one panel, so it appears in exactly one eye's view. This is also the fastest diagnostic: close each eye in turn to confirm which panel carries the defect.
Is the dot I see actually dust behind the lens?+
Very possibly — dust ingress between lens and panel is the most commonly reported Index display complaint. Dust looks soft-edged and appears to shift position as your eye moves off the lens centre; a dead pixel is sharp and locked to the displayed image. Dust can be cleaned by removing the lens (iFixit has guides); a dead pixel cannot.
Do the Index's refresh rate modes (80/90/120/144Hz) affect dead pixels?+
No. A dead pixel is dead at every refresh rate — the photosite receives no drive signal regardless of timing. If a dot appears only at one refresh rate, you're looking at a rendering or cable artefact, not a panel defect; try reseating the tether cable at the headset end.
Should I buy a used Valve Index with a known dead pixel?+
At the right price, it's defensible — the Index still offers excellent tracking, controllers, and off-ear audio for PC VR. But there's no warranty on second-hand units, LCD panels this age can develop further defects, and the tether cable (a known wear item) costs real money to replace. Price the unit as end-of-life hardware, not as a discounted current headset.