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BenQ Projectors Keep Losing HDMI Signal: How To Fix Them?

BenQ Projectors Keep Losing HDMI Signal: How To Fix Them?

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Do you keep experiencing HDMI signal issues with your BenQ projector? It’s not uncommon for HDMI cables to lose signal due to loose ports and faulty wirings. However, if it becomes a frequent occurrence, it’s a clear sign that there’s an even bigger issue. 

In this article, we look for an answer to the question “Why does my BenQ projector keep losing HDMI signal?” We also dive deep into how you can fix HDMI signal errors according to specific scenarios. 

Keep reading to learn more!

Why does my BenQ projector keep losing HDMI signal?

BenQ Projector

There are several reasons why your BenQ projector keeps losing HDMI signal. It could be a handshake issue caused by HDCP or faulty cabling. It’s also possible that you’ve just inserted your HDMI cable into its port the wrong way or have a loose connection. 

Whatever the case, we’ve compiled a list of easy and replicable solutions for you to use: 

Fixing HDCP/HDMI handshake issues

HDMI cable pluggin a device

HDCP or HDMI handshake issues can cause HDMI cables to lose signal. One way to get out of the issue is to restart both your source and output devices and try reconnecting your HDMI cable. 

Step 1 – Press the power button on both your source and output devices. 

Step 2 – Wait ten seconds and unplug the main power source.

Step 3 – Unplug the HDMI cable and reattach them after ten seconds. Make sure both ends are snug inside their respective ports. 

Step 4 – Plug the power source back into its socket. Power on both source and output devices. 

This should refresh the HDCP handshake process, giving it a second chance to pull through. If this doesn’t work, you could also try transferring to a different HDMI port. Most projectors provide two ports (HDMI 1 and 2). 

Changing faulty cables

Blue HDMI cable and red HDMI cable

Cracked or broken cables can also cause signal loss in the BenQ projector. If the power source is fully functional, and so are the rest of your BenQ projector’s components, the issue may be a faulty HDMI cable. 

Check your HDMI cable for any cracks or breaks. On top of that, examine the pins inside the HDMI head for bends or breaks. Pins that are broken can cause image distortion and discoloration, and signal loss. 

If you notice something wrong with your HDMI cable, the only way to fix this is to get a new pair. You can get a fresh pair of HDMI cables  from Amazon or any other AV equipment stores you find. 

Cleaning HDMI ports

HDMI port on a black device

Dust, grime, and other debris can also cause HDMI signal loss in the BenQ projector. Check both your source’s and your output’s HDMI ports, see if there’s any need for cleaning at all. 

The most effective way to clean HDMI ports is “Air Cleaning.” For this, you’ll need a compressed air duster to blow away dirt and dust that have stuck themselves onto the HDMI port components. 

You stick its nozzle inside the HDMI port/s and blow, being careful that it doesn’t dislodge other components. 

Adjusting video resolutions

A family watching film on projector screen

Like all AV devices, HDMI cables have a set resolution for the type of content they can transmit. If your video content doesn’t match the resolutions provided by either your source or output devices, signal errors may happen. 

To solve this issue, you can adjust your video’s resolution to be more compatible with your HDMI cable and other devices. You can do this using a video editor or converter, which can be downloaded for free or for a small cost online. 

HDMI cable length

Man checking HDMI cable

Not many people know this, but HDMI cable length can also affect HDMI signals during data transfers. If your HDMI cable is longer than 10 meters, it may interfere with the speed or efficiency at which data travels through the HDMI cable. 

In this case, it would be best to get an HDMI repeater  or Cat5e Extender . Otherwise, consider keeping your HDMI cable to a minimum of 20 feet.

FAQS About HDCP and BenQ Projectors

What is HDCP?

HDCP words on a green circuit board background

HDCP or High-bandwidth Digital Content Protection is a program to protect copyrighted digital content from illegal duplication and distribution. All HDMI ports and HDMI cables are imbued with this protective protocol. Using a non-HDCP-compliant source with an HDCP-protected HDMI cable, this often results in video or audio errors. 

Does BenQ support HDCP?

a 4K BenQ projector in active

BenQ is determined to provide its clients with an unforgettable viewing experience through its products. They make sure that all their devices are HDCP-compliant, to ensure compatibility with other devices.

What causes HDCP handshake issues?

There are several things that may cause HDCP handshake issues. The most common is faulty HDMI cables. 

HDMI cables with cracks, breaks, or broken pins can fail to establish a stable connection between source and output devices. 

Additionally, using HDMI cables that don’t match the HDMI versions on your devices may also cause handshake issues. 

What HDMI types are there?


There are three (3) HDMI types used today: 

  • Type A
  • Type C or Mini-HDMI connector
  • Type D or Micro-HDMI connector

HDMI Type A is the most common format found on AV devices such as laptops, computers, TVs, and gaming consoles. It has a large plug size (13.9 x 4.45 mm) and comes with two “male” connectors on both ends. 

On the other hand, Type C is more often seen in cameras, camcorders, and tablets. They look like a smaller version of the HDMI Type A and has a plug size of 10.42 x 2.42 mm. 

Finally, we have HDMI Type D. It’s the smallest HDMI plug type and are seen in devices like smartphones and wearables. It has a plug size of 5.83 x 2.20 mm and is perfect for portable, compact devices. 

Will the HDCP version also affect HDMI signal?

do hdmi cables come with monitors

HDCP isn’t backward-compatible with its older versions. In other words, if your source is using an HDCP 2.2 version but your output is using an HDCP version 1.4, handshake issues are to be expected. 

You may use an HDMI adapter to match your source, to solve this issue. Or you may also buy a new output device to view your content on. 

Final thoughts

BenQ projector hanging on the ceiling

HDMI signal interferences can be caused by several factors, from faulty cables to excessive cable length. The methods we’ve provided today should help you out of your situation. All of these techniques have been tried and tested, and all work pretty well, depending on the situation. 

If your BenQ projector keeps losing HDMI signal even after trying all the solutions we mentioned above, it may be time to contact an expert or to get an entirely new device.

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