Why the BenQ TK700 PS5 120Hz Not Working Issue Happens
If your BenQ TK700 is not showing 120Hz from a PlayStation 5, the problem is usually a settings mismatch, cable limitation, or a signal mode the TV/projector chain cannot negotiate.
The good news is that PS5 120Hz output on the TK700 is supported in the right setup, so most failures are fixable without replacing hardware.
Because the PS5, HDMI cable, AV path, and projector all have to agree on resolution, refresh rate, HDR, and output format, one small mismatch can force the console back to 60Hz.
That is why the BenQ TK700 PS5 120Hz not working problem often looks random even though the cause is usually systematic.
What the BenQ TK700 Supports Over HDMI
The BenQ TK700 is designed for low-latency gaming and supports high refresh rates at common console resolutions.
For PS5 use, the important detail is that 120Hz output depends on both resolution and HDMI signal path, not just the projector itself.
- Supports 1080p at 120Hz for PS5 gaming.
- Can also handle higher refresh rates at lower resolutions in supported scenarios.
- Requires a stable HDMI 2.0-class connection for reliable console gaming features.
- Works best when the PS5 is connected directly, without intermediate switches or capture devices.
Many users expect 4K 120Hz from a projector in this class, but the more realistic and widely used setup is 1080p 120Hz.
If the console is set to a mode the TK700 cannot negotiate cleanly, the PS5 may fall back to 60Hz or display an unsupported signal.
Check the PS5 Video Output Settings First
The most common fix is on the PlayStation 5 itself.
Sony places refresh-rate controls inside the video output menu, and the system may prioritize compatibility over performance unless you explicitly enable the right options.
Recommended PS5 settings
- Go to Settings > Screen and Video > Video Output.
- Set Resolution to 1080p for initial testing.
- Set 120 Hz Output to Automatic.
- Set VRR to Off for troubleshooting.
- Set HDR to Off temporarily to rule out handshake issues.
After changing those settings, restart the PS5 and power-cycle the projector.
If the signal appears at 120Hz in 1080p, you can later re-enable HDR or other features one at a time to see which setting caused the conflict.
Use the Correct HDMI Cable and Port Path
A poor or incompatible cable is one of the fastest ways to trigger the BenQ TK700 PS5 120Hz not working symptom.
Even if the cable works at 60Hz, 120Hz needs better signal integrity because the bandwidth requirement is higher.
What to use
- Use the official PS5 HDMI cable first.
- Replace any very long or low-quality HDMI cable.
- Connect the PS5 directly to the TK700, not through a receiver or splitter.
- Avoid HDMI adapters, capture cards, or switch boxes during testing.
If you need a longer run, choose a certified high-speed or ultra high-speed cable from a reputable manufacturer.
Active or optical HDMI cables can help over long distances, but only if they are known to be compatible with the source and display.
Verify the BenQ TK700 Input and Picture Mode
On the projector side, the wrong input mode or processing setting can interfere with the PS5 handshake.
The TK700 is built for gaming, but a non-gaming picture mode may still add processing or affect how the signal is reported.
- Select the HDMI input used by the PS5.
- Choose a gaming-focused picture mode if available.
- Disable unnecessary processing features during testing.
- Check that the projector firmware is current if BenQ has released updates for compatibility.
Also confirm that the projector is not forcing a manual resolution or aspect setting that could override the incoming PS5 signal.
When troubleshooting, keep the TK700 in a simple, default-friendly state so the console can negotiate the refresh rate cleanly.
Test with a Known 120Hz Game
Even when the system is configured correctly, the PS5 will not output 120Hz in every game.
Many titles only support 120Hz in specific modes, performance settings, or multiplayer playlists.
Use a game that is known to support 120Hz on PS5, then check whether its in-game graphics or display options include a performance or 120Hz mode.
If the game itself is capped at 60fps, the projector may be working correctly even though the signal never changes.
Good troubleshooting pattern
- Set PS5 video output to 1080p and Automatic 120Hz.
- Launch a game with confirmed 120Hz support.
- Enable the game’s performance mode if required.
- Check whether the TK700 reports the expected refresh rate.
This step matters because the console menu alone does not guarantee a 120Hz gameplay signal.
The game must support it, and some titles only activate high refresh mode after a separate toggle.
Common Causes of BenQ TK700 PS5 120Hz Not Working
If the setup still fails, the issue usually falls into one of a few categories.
Narrowing these down can save time and prevent unnecessary hardware replacement.
- Cable bandwidth problem: the HDMI cable works for 60Hz but fails at 120Hz.
- Resolution mismatch: the PS5 is set to 4K or a mode the projector is not negotiating properly.
- HDR handshake conflict: HDR changes the signal path and may interrupt 120Hz negotiation.
- Intermediary device limitation: AV receivers, switches, or capture devices block 120Hz.
- Game limitation: the title being tested does not actually support 120Hz on PS5.
- Firmware or compatibility issue: projector or console software needs a refresh.
In practice, cable quality and intermediate devices are the two most frequent causes.
Direct connection testing is the fastest way to isolate them.
Step-by-Step Fix for the TK700 and PS5
Use this sequence if you want the fastest path to a stable 120Hz result.
- Turn off the PS5 and BenQ TK700.
- Disconnect any receivers, soundbars with HDMI pass-through, switches, or capture cards.
- Connect the PS5 directly to the projector using the official HDMI cable.
- Set the PS5 to 1080p, 120Hz Automatic, HDR Off, and VRR Off.
- Power on the projector first, then the PS5.
- Launch a confirmed 120Hz PS5 game.
- If it works, re-enable HDR or other features one at a time.
If the signal works only after a restart, the issue was likely a handshake problem.
If it still does not work, swap the HDMI cable before testing anything else.
When 120Hz Works in Menu but Not in Games
Some users see 120Hz indicated in system menus or on-screen status overlays, but the actual game still feels like 60Hz.
That usually means the console output is correct, but the game is not using the high-refresh mode.
Check whether the title has separate settings such as performance mode, 120Hz mode, frame rate mode, or reduced visual quality for higher refresh.
On PS5, high refresh often comes with lower resolution, dynamic image settings, or disabled ray tracing.
That tradeoff is normal and should not be mistaken for a malfunction.
When to Suspect a Hardware Fault
If you have tested a direct HDMI connection, a known-good cable, compatible PS5 settings, and a confirmed 120Hz game, then a hardware issue becomes more plausible.
At that point, try another console or another display to verify whether the projector’s HDMI input or the PS5 output is at fault.
A real hardware fault is less common than a settings problem, but it can happen.
Symptoms may include no signal at 120Hz, unstable flickering, frequent black screens, or the projector dropping back to 60Hz despite correct settings.
Best Practices to Keep PS5 120Hz Stable on the BenQ TK700
- Keep the PS5 connected directly to the projector whenever possible.
- Use a certified high-quality HDMI cable.
- Start troubleshooting at 1080p before trying other formats.
- Change one setting at a time when testing HDR, VRR, or resolution changes.
- Confirm the game itself supports 120Hz on PS5.
- Keep projector and console software updated.
With the right signal path and PS5 settings, the BenQ TK700 is capable of delivering the responsive 120Hz gaming experience it was designed for.
The key is to treat the connection as a chain: if any link is weak, the console will usually fall back to safer output.