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KEYSTONE-ERR

Epson · Epson Home Cinema 2350 3LCD 1080p Smart Streaming Projector with Android TV and Built-In Speaker

Epson Epson Home Cinema 2350 3LCD 1080p Smart Streaming Projector with Android TV and Built-In Speaker KEYSTONE-ERR Error Fix: Keystone Correction Not Working

The automatic keystone correction is not functioning or the manual keystone adjustment is at its limit — ensure the auto keystone feature is enabled in the menu; if manual adjustment is maxed out, physically reposition the projector to reduce the angle; excessive keystone correction (beyond ±30°) significantly degrades image quality

Medium severity2 fixes available✨ Free fix available

Quick Answer

Error KEYSTONE-ERR on the Epson Epson Home Cinema 2350 3LCD 1080p Smart Streaming Projector with Android TV and Built-In Speaker means: Keystone Correction Not Working. The top-ranked community fix is “Inspect and Repair Keystone Correction Sensor or Internal Mechanism” (hard difficulty, ~60 min, DIY cost: $0). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · projector

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many projector repairs can be done safely at home, consider hiring a qualified technician if:

The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $150-$250.

Other Epson Models with Error KEYSTONE-ERR

Epson EpiqVision Ultra LS500 4K PRO-UHD Ultra Short Throw Laser Projector with Android TV

projector · 2 fixes

Epson Home Cinema 5050UB 4K PRO-UHD 3LCD Projector with HDR and Lens Shift

projector · 2 fixes

Other Epson Epson Home Cinema 2350 3LCD 1080p Smart Streaming Projector with Android TV and Built-In Speaker Error Codes

COLOR-DRIFT

Colors Inaccurate or Yellowing

2 fixes

DUST-BLOBS

Dust Spots Visible in Projected Image

Cooling Fan Failure

Excessive Fan Noise

Air Filter Cleaning Required

2 fixes

HDMI-NO-SIGNAL

No HDMI Signal Detected

2 fixes

IMAGE-FOCUS

Image Out of Focus or Blurry

2 fixes

LAMP-COVER

Lamp Cover Not Secured

2 fixes

People Also Ask About Epson Epson Home Cinema 2350 3LCD 1080p Smart Streaming Projector with Android TV and Built-In Speaker Error KEYSTONE-ERR

What does error code KEYSTONE-ERR mean on a Epson Epson Home Cinema 2350 3LCD 1080p Smart Streaming Projector with Android TV and Built-In Speaker?

Error code KEYSTONE-ERR on the Epson Epson Home Cinema 2350 3LCD 1080p Smart Streaming Projector with Android TV and Built-In Speaker means: Keystone Correction Not Working. The automatic keystone correction is not functioning or the manual keystone adjustment is at its limit — ensure the auto keystone feature is enabled in the menu; if manual adjustment is maxed out, physically reposition the projector to reduce the angle; excessive keystone correction (beyond ±30°) significantly degrades image quality

How do I fix error code KEYSTONE-ERR on my Epson Epson Home Cinema 2350 3LCD 1080p Smart Streaming Projector with Android TV and Built-In Speaker?

The most successful fix is "Inspect and Repair Keystone Correction Sensor or Internal Mechanism" (hard difficulty, ~60 minutes). This fix costs nothing. HomeMD has 2 community-ranked fixes for this error.

Is error code KEYSTONE-ERR on a Epson Epson Home Cinema 2350 3LCD 1080p Smart Streaming Projector with Android TV and Built-In Speaker serious?

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Can I fix Epson Epson Home Cinema 2350 3LCD 1080p Smart Streaming Projector with Android TV and Built-In Speaker error KEYSTONE-ERR myself?

Yes — the top-ranked community fix ("Inspect and Repair Keystone Correction Sensor or Internal Mechanism") is rated hard difficulty and takes about 60 minutes. Tools needed: T10 Torx screwdriver, Multimeter, Anti-static wrist strap.

How much does it cost to repair Epson Epson Home Cinema 2350 3LCD 1080p Smart Streaming Projector with Android TV and Built-In Speaker error KEYSTONE-ERR?

DIY cost: $0. Professional repair typically costs $150-$250. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Epson Epson Home Cinema 2350 3LCD 1080p Smart Streaming Projector with Android TV and Built-In Speaker have?

The Epson Epson Home Cinema 2350 3LCD 1080p Smart Streaming Projector with Android TV and Built-In Speaker has 8 other known error codes, including: COLOR-DRIFT (Colors Inaccurate or Yellowing), DUST-BLOBS (Dust Spots Visible in Projected Image), FAN-ERROR (Cooling Fan Failure), FAN-NOISE (Excessive Fan Noise), FILTER-CLEAN (Air Filter Cleaning Required), and 3 more.

Which other Epson models have the KEYSTONE-ERR error?

Error code KEYSTONE-ERR also appears on 2 other Epson models: Epson EpiqVision Ultra LS500 4K PRO-UHD Ultra Short Throw Laser Projector with Android TV, Epson Home Cinema 5050UB 4K PRO-UHD 3LCD Projector with HDR and Lens Shift. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Epson Epson Home Cinema 2350 3LCD 1080p Smart Streaming Projector with Android TV and Built-In Speaker have?

The Epson Epson Home Cinema 2350 3LCD 1080p Smart Streaming Projector with Android TV and Built-In Speaker has 8 other known error codes:

COLOR-DRIFT — Colors Inaccurate or Yellowing (2 fixes)
DUST-BLOBS — Dust Spots Visible in Projected Image (2 fixes)
FAN-ERROR — Cooling Fan Failure (2 fixes)
FAN-NOISE — Excessive Fan Noise (2 fixes)
FILTER-CLEAN — Air Filter Cleaning Required (2 fixes)
HDMI-NO-SIGNAL — No HDMI Signal Detected (2 fixes)
IMAGE-FOCUS — Image Out of Focus or Blurry (2 fixes)
LAMP-COVER — Lamp Cover Not Secured (2 fixes)

Which other Epson models have the KEYSTONE-ERR error?

Error code KEYSTONE-ERR also appears on 2 other Epson models:

Epson EpiqVision Ultra LS500 4K PRO-UHD Ultra Short Throw Laser Projector with Android TV (projector) · 2 fixes
Epson Home Cinema 5050UB 4K PRO-UHD 3LCD Projector with HDR and Lens Shift (projector) · 2 fixes

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