Epson LS11000 No Signal at 4K120 on PC? Check HDMI and EDID

If your Epson Home Cinema LS11000 goes blank or shows a No Signal message only when a Windows PC sends 4K at 120Hz, treat it as a signal-path problem before you suspect the projector. First confirm the projector can display its own menu. Next, get a plain 1920 × 1080 picture at 60Hz over a direct HDMI connection with no receiver in between. Only then step up to 3840 × 2160 at 60Hz, then 120Hz, using an HDMI 2.1 rated (ultra-high speed) cable and checking the EDID setting for the HDMI port you are using. Add HDR last.

This guide covers the US model (V11HA48020). It is based on Epson’s US user guide, support FAQ, and product page. It does not promise that every PC, cable, or receiver combination will reach 4K 120Hz with HDR, and it shows where the free checks end and a cable swap or service call begins.

Quick Fix Checklist

• Press Blank on the remote in case the picture was only switched off.
• Press Menu. If the menu appears, the projector is producing an image.
• Remove the AV receiver, HDMI switch, or adapter and connect the PC straight to the projector.
• Set the PC to 1920 × 1080 at 60Hz and confirm you get a picture.
• Check Signal I/O → EDID for the HDMI port you actually use.
• Use an HDMI 2.1 rated (ultra-high speed) cable for 4K 120Hz.
• Raise the PC to 4K 60Hz, then 4K 120Hz, then turn HDR on.

Why Does 4K120 Fail When Lower Modes Work?

A working 1080p picture does not establish that the same connection can deliver 4K at 120Hz. Check the cable, the selected port’s EDID setting, any receiver in the path, and the PC’s HDMI output capability before attributing the failure to one component. The table below shows which layer to check for each symptom.

Is the Projector Itself Able to Show an Image?

A visible projector menu establishes that it can display its own image. That lets you proceed to the external input checks below. It does not establish that every part of the projector, including its HDMI input, is working correctly.

1. Use the remote’s Blank button to check whether blanking was enabled.
2. Open Menu using the projector’s control panel or its remote. If the menu shows, continue to the next section.
3. If neither the menu nor any image appears, check the status lights against the Projector Light Status table in the user guide. Several light patterns tell you to turn the projector off, unplug it, and contact Epson. That is a support case, not a 4K120 problem.

Check the model too. The US product page identifies this LS11000 as V11HA48020; this guide follows its US documentation. Instructions for other regional versions or for the LS12000 are not included.

Does a 1080p 60Hz Picture Work Over a Direct HDMI Connection?

That is the baseline to establish before any 4K120 troubleshooting. 1920 × 1080 at 60Hz is a listed HDMI input format for the LS11000. If the PC cannot show that over a direct cable, investigate source selection, PC output, the cable, and the projector’s basic input path before moving on to 4K120.

1. Connect the HDMI cable before you power on the PC. Epson’s guide warns not to turn on the video source before connecting it to the projector, because doing so could damage the projector.
2. Use the remote’s matching source button to select the HDMI port you used.
3. If it is a laptop, Epson’s guide says to hold the Windows key and press P, then choose Duplicate.
4. Set the PC’s display to 1920 × 1080 at 60Hz in Windows display settings or your graphics control panel.

Epson also directs you to keep the computer’s output within the supported resolution and refresh-rate limits. These are the HDMI input rows from the US guide’s Supported Video Display Formats table that matter for a PC:

The table is useful in two ways. First, 1080p is listed only up to 60Hz. A PC left at 1080p 120Hz from a previous high-refresh monitor is sending a format the table does not list. Second, 120Hz is listed only at 4K resolutions, so a 120Hz test should use 3840 × 2160.

If 1080p 60Hz still gives No Signal, Epson’s guide has a separate section for that case. For a No Signal message, its suggested checks are to select a source with the remote, check the connection, make sure a laptop is set to display on an external monitor, power-cycle the projector and source, and try a different video cable.

Does It Work With the Receiver, Switch, or Adapter Removed?

Test that before changing any 4K120 setting. Epson recommends reducing the cable length and bypassing intermediate equipment. If 4K 120Hz works directly but fails through an AV receiver, switch, dock, or adapter, investigate that added path and its settings. The comparison does not identify a defective component by itself.

Both HDMI1 and HDMI2 support HDCP 2.3. HDMI2 is also the eARC/ARC port, intended for sending audio back to an A/V system. Epson notes that connecting an A/V system that does not support eARC/ARC to HDMI2 may distort the image. For this test, use a short cable from the PC’s own HDMI output to either projector port and leave everything else unplugged.

If the direct path works, you have two choices: keep the PC on a direct connection and route audio another way, or follow the receiver maker’s documentation for its 4K 120Hz pass-through settings. This guide does not cover receiver menus because they differ by brand and model.

How Do You Get 4K 120Hz From a PC to the LS11000?

Use a direct connection, an HDMI 2.1 rated cable, and an EDID setting that matches the port. Then raise the PC to 4K 60Hz before 120Hz. Epson advertises 4K HDR input at up to 120Hz for this model; the result still depends on the PC output, cable, and intervening settings. The fix takes 6 steps.

1. Confirm the PC can send 4K 120Hz over HDMI. Epson’s guide says the computer’s refresh rate must be compatible with the projector and refers you to your computer or video card manual. Check your GPU’s or laptop maker’s specifications for the HDMI port you are using. A USB-C or DisplayPort adapter adds another device that must also support the mode.
2. Use the right cable. For 4K 120Hz, Epson specifies an HDMI 2.1 rated, ultra-high-speed cable and warns that an incompatible cable can cause display problems. For an optical HDMI cable, also connect its USB power lead to the projector’s Opt.HDMI (300mA) port.
3. Select the source before opening Signal I/O. Connect and select the relevant input before changing its settings. Open Signal I/O while you are on a working baseline picture (for example, 1080p 60Hz) from the same port.
4. Check EDID for that port. In Signal I/O, EDID is set separately as EDID (HDMI1) and EDID (HDMI2). EDID communicates the projector’s display capabilities. Epson directs you to match EDID Mode to the resolution and check the applicable Signal Format or EDID setting under Signal I/O. The US user guide we checked does not list the individual EDID Mode choices, so read the options your menu shows, note the original value, and pick the one meant for the resolution you want. If No Signal persists, restarting the projector and source is another check in Epson’s no-signal guidance.
5. Step up one level at a time. Set the PC to 3840 × 2160 at 60Hz and confirm a picture, then switch to 120Hz. If 4K 60Hz works and 120Hz does not, focus the next checks on the cable, EDID mode, and PC output capabilities. This result alone does not prove a hardware fault.
6. Check what the projector actually receives. Management → Information reports the current input’s Resolution and Refresh Rate, along with other projector information. You can also open it with the Information button on the remote. This shows the incoming signal, not your in-game frame rate.

How Do You Bring Back HDR After 4K120 Works?

Turn HDR on only after 4K 120Hz works in SDR, and leave the projector’s HDR handling on Auto. Epson’s guide says to set Color Space and Dynamic Range to Auto for most cases, and Signal Status shows the HDR type the projector detects. If HDR then fails, return to the working SDR setting and investigate the HDR output format before assuming a hardware failure.

• Color Space: Auto is Epson’s usual recommendation for both Color Space and Dynamic Range; its color troubleshooting also recommends Auto for HDR.
• Signal Status: under Dynamic Range, this displays the detected input signal, so you can tell whether HDR is arriving at all.
• HDR10+ EDID option: under EDID, Epson says to set HDR10+ to Off to display images correctly when the current source does not support HDR10+.

The US guide does not include a table of every HDR, chroma, and bit-depth combination at 4K 120Hz, and Epson’s product page notes that HDR performance is available with select third-party devices. If 4K 120Hz SDR and 4K 60Hz HDR both work but 4K 120Hz HDR does not, decide which one you value more. Record the working and failing modes and check the GPU’s documented output support with the manufacturer before buying more equipment.

Should You Replace the Cable, Call Epson, or Replace the Projector?

Replace only what the checks point to. If a direct connection gives 1080p and 4K 60Hz but never 4K 120Hz, try substituting a known suitable ultra-high-speed HDMI cable if one is available before buying one. If nothing works even at 1080p 60Hz from a direct PC, contact Epson. A new projector will not fix a cable, receiver, or PC output problem.

• Only 4K 120Hz fails, direct path, EDID checked: try another HDMI 2.1 certified (ultra high-speed) cable, then the other HDMI port with its own EDID setting. Epson’s guide says these cables are available from Epson or an authorized Epson reseller.
• Nothing works at any mode, from more than one source: Epson’s last listed step is to reset settings from the Initial/All Settings menu with Reset All. Review which menus are selected for Reset All, and save any settings you want to preserve before resetting them.
• Still no image after that: contact Epson support. The guide lists what to have ready: product name, serial number, proof of purchase, your computer or video configuration, and a description of the problem. Check your current regional warranty and service options. Leave internal repairs to qualified service personnel.

Consider replacement only after Epson’s diagnosis and a comparison of warranty or repair options, or when you have an independent reason to change projectors. If replacing the same model is appropriate, the following card is the verified US Epson Home Cinema LS11000 4K HDR Laser Projector listing. Compare seller, condition, warranty terms, and the cost of repair before buying.

Epson Home Cinema LS11000 4K PRO-UHD Laser Projector with HDR10+ | 3-Chip 3LCD, 2,500 Lumens of Color and White Brightness, 1.2 Mill:1 Dynamic Contrast, Motorized Lens Shift and Focus, 120Hz

Check on Amazon

Please check the Amazon product page for the latest price and availability.

FAQ

Does Frame Interpolation give me 120Hz from my PC?

No. Frame Interpolation inserts generated frames between the frames you send. It does not change the input signal, and it is switched off at 4K 120Hz. Epson limits this feature to Fine image processing and excludes incoming 4K 100/120Hz signals. A 120Hz input has to come from the PC.

Is the LS11000 a native 4K projector?

No. Epson’s US user guide describes Full HD native resolution with 4K Enhancement, and the product page explains that its 4K Resolution Enhancement Technology shifts each pixel to produce the on-screen image. The projector still accepts a 3840 × 2160 input signal at up to 120Hz, which is what matters for this problem.

Which HDMI port should a PC use?

Either port can be used. HDMI1 and HDMI2 both support HDCP 2.3, and EDID is set separately for each. HDMI2 is also the eARC/ARC port. The US guide we checked does not reserve 4K 120Hz for one port, so check the EDID setting for whichever port the PC is plugged into.

How We Researched

This article is based on Epson’s US documentation for the Home Cinema LS11000 (V11HA48020): the Home Cinema LS11000 User’s Guide (PDF), the US support FAQ Nothing projects on the screen. What should I do?, and the US product page. We have not conducted hands-on lab testing, and we did not use community reports because none confirmed by multiple sources were available. The step order is diagnostic reasoning based on Epson’s documented formats and settings, not a measured result. Your projector’s hardware revision and firmware version, and your PC’s GPU and drivers, can change the outcome.

Conclusion

A blank screen at 4K 120Hz on the LS11000 is a reason to isolate the input path one step at a time. Work up from the bottom: a visible menu, then 1080p 60Hz direct, then 4K 60Hz, then 4K 120Hz with an HDMI 2.1 rated cable and a matching EDID setting for that port, then HDR on Auto. Stop at the first failing step and investigate that layer. Use a substitute cable where possible and contact Epson before committing to a replacement projector.