Best Mini Projector FAQ and Solutions

Best Mini Projector FAQ and Solutions

March 22, 2020

1. Is there any way to reduce noise? Can I replace the fan with my own accessories by myself?

a. First, to rule it out as the cause for the fan's problem (e.g. the fan will get loose because of the collision, therefore, it will make noises). You may check whether the fan can work normally without playing any videos or music when the projector is on.

b.There is the heat source of the LED lights inside the projector and it needs the fan to cool down. The noise of the fan should be within 50DB on the date of manufacture.

c.Customers are not allowed to replace the fan by themselves.

2. How to remove the condensation inside the lens?

a. The use and preservation humidity of the projector should be controlled between 40% and 80%. If the air humidity is not within the range, you may take some measures to reduce the humidity like put a dehumidifier in the room;

b.Pre-heating before turning the projector on can help get rid of the condensation, or you may put the projector in a dry environment for 48 hours.

3. How to remove fingerprints inside the lens?

a. First, make sure the dirt or fingerprints were not stuck to the surface of the lens when the consumers were unpacking the product or during the use of the projector. The dirt on the surface of the lens can be wiped off by cleaning cloth and it will not be a matter to the use.

b.If the dirt or fingerprints are within the lens, the consumers may not be able to deal with this problem by themselves.

c.Before the products leave the factory, the QA technician will carefully check the cleanliness inside the lens; while there is a missing rate of inspection or the accidental drop of the machine may also cause a dirty lens.

4. There's no sound after connecting the fire stick. VGA has no sound. The external loudspeakers do not synchronize with sounds.

a. First, to rule it out as the cause of the speakers' problem. You may switch to other signal sources like HDMI, flash drive play to decide whether it's the problem of the speakers;

b.If other signal sources are normal, you may check if the fire stick has been misused or broken down;

c.VGA signal does not support audio transmission. VGA is a video transmission standard and can only transmit videos or images;
d.It is highly possible that the mainboard of the projector has broken down if the external loudspeakers fail to synchronize with sounds.

5. How to remove the shadow on the projection screen?

The shadow can be a display error caused by oil dirt or other dust.

6. How to remove the burn-in on the projection screen?

The burn-in is typical and usually caused by the malfunction of the cooling system. It is suggested that the projector shall not be used under a high-temperature environment and please do not block the air inlet/outlet.

7. Why the projector's screen turns black in 10 mins after turning on the projector? However, it can be turned on after cooling down.

a. The LED lights have thermal protection settings and it will turn off automatically when the temperature is too high. Usually, this problem is caused by the malfunction of the cooling system.

b.Please check if the fan is working normally. Do not block the air inlet/outlet and do not use the projector under a high-temperature environment.

8. How to remove stains or dirt on the projection screen of an LCD projector?

The LCD projector is not dust-proof and the dust can get into the projector through the air inlet or the dust is inside the projector already so that the projection shadow occurs.

9. Why the focus(or the keystone) can't move and doesn't work?

Vibration or shock may get the structure stuck.

10. LED lights stopped working. Can I replace the LED lights by myself?

a. If the LED lights touch the foreign matter, the short circuit may occur and cause malfunction of the lights.

b.The iron will be used during the lights replacement process and the positive and negative of the lights are welded on the power board. Therefore, it is too dangerous for users to replace the lights by themselves.

11. After connecting with HDMI, the projection screen doesn't show or only show a screen protection image.

When the computer is connected with the projector, you need to set the "projection display method" and usually, it is recommended to choose "copy".

12. How to get the focal length of a projector refocused clearly? What to do if the right/left area is blurry?

a. Projection imaging is a technology that functioned by 10 lenses inside the body. The position or the shape of any lens and the focal length may affect its image shaping, which displays particularly obvious on machines with a resolution of 480/720 pixels.

b. The clarity of products will be through 100% quality inspection to make sure they all meet our specs. Customers can optimize the product by following below if they cannot adjust it properly:

1. Ensure the image is projected in a square, that is to say, the machine should be positioned properly (the left and right side of the screen should be in the same length, so is the up and downside of the screen);

2. Reduce the keystone correction, for it, may change the light path and drift away from the best clear point;

3. Adjust the focal length so that the lens can move from one point to another to refocus. This is to amend the position of the lens that may drift away from being transported or crashed.

13. What should I do if the projector fails to startup?

a. Make sure the power is on before pressing the startup key;

b. Does the fan work when the machine is on? If it does while there is no image, there may be something wrong with the mainboard or LED/LCD screen, which need to get fixed by the factory;

c. If the machine is with battery, the battery should be checked anyway: Check if the pilot light is on when the adapter is plugged in or compare with other adapters (i.e.mobile phone adapter). This is to check if the original adapter works or not; If not, a new one will be delivered to customers at once; The use of non-original adapters may not be able to meet the power of the projector for playback and charging, resulting in a failure normal startup of the machine. Customers hereby are suggested to use the original one.

14. What to do if the projector crash when connecting to my iPhone?

a. Confirm the format and capacity of the U-disk (Format: FAT32; 9-32G)

b. DO NOT operate while upgrading

c. DO NOT cut down the electricity while upgrading

d. Please refer to the guide video or manual that is provided. The general guidance is as follows:

15. How to upgrade the projector's system or what to do if it shows 'fail to upgrade'?

1. Customers shall unzip the files and save them into the U-disk (Format: FAT 32; 9-32G) instead of into a folder;

2. Switch on the power and plug in the adapter ( or power cable);

3. Upgrade will be automatically triggered once the power is on (some may need to go to 'settings' - 'local upgrade' to get updated);

4. Power will be switched on automatically once the upgrade is done.

16. What can I do if a projector doesn't work when connecting to HDMI or it shows 'no input signal'?

a.Ensure to select the correct signal source, which can be operated by monitor or User Interface.

b.Customers can use other HDMI to test if the problem caused by the cable material or interface fault.

c.There was a problem with the 2.4MacBook output adapter that was 4K and not downward compatible with 1080P when entering the device (such as from HUB, Mini DP to HDMI); Or there's something wrong with the cable(lightning to HDMI) itself.

17. Why the system response of a projector is so slow?

a.Linux operation system responses slower than Android;
Moreover, Linux buffers data occasionally, which does have impacts as time goes by.

b. If there has some evident pause, customers are suggested to switch the machine off or restore the factory default settings.

18. How to extend a projector's battery?

a. Take Burger 101 as an example: Theoretically, battery with 5200mAh lasts 1hr & 40mins. However, it may vary from a lower-temperature environment or the place where you set.

b. Ensure if there's something wrong with the battery: Play a movie after the battery is fully charged. It is normal if the battery lasts more than 1hr;

c. Technically, the battery will be charged on and off, meaning the more time it gets charged, the less time it lasts; Customers are suggested to connect an adapter when playing a movie that is more than 2hrs.

19. Why the 3D function is not available in the projector?

a. Active-shutter 3D Glasses are required to use.

b. 3D Glasses in the format of Side By Side, Top Bottom are currently supported; while Frame Packing can be used only through HDMI input that played by blue-ray DVD player

c. Remove those possible lights which may interfere the glasses to receive the signal

20. Why the video is unable to play in a projector?

a. The format of U-disk is FAT, which maximum supports with 32G.

b. Open the video file information to ensure it is in the correct format; Otherwise, convert it.

PS: There are 2 files when downloading videos by Apple Mac. One of them is available to be played.

21. What can I do if the claw hanger doesn't match the projector?

Claw hanger in the market usually comes with a size description that complies with all kinds of machines. Customers should purchase the proper one and the machine should be able to claw if they're patient enough.

22. What can I do if the projector is suspended from the ceiling where its lower part is quite blurry?

Clarity of all the products will be through 100% quality inspection to make sure they all meet our specs. Customers can do as follow to get optimized:

1. Ensure the image is projected in a square, that is to say, the machine should be positioned properly (i.e. the left and right side of the screen should be in the same length, so is the up and downside of the screen);

2. Reduce the keystone correction, for it, may change the light path and drift away from the best clear point;

3. Adjust the focal length so that the lens can move from one point to another to refocus. This is to amend the position of the lens which may drift away from being transported or crashed.

23. Does the Vankyo projector support multi-display with the wire converter?

The Vankyo projector Leisure 3W does support with the wireless multi-display but not with the wire one, which requires an extra screen stick to receive multi-display.

24. What's the recommended projected distance when projecting PPTs?

The recommended minimum distance for projection is: 1.5-2.5meters between the lens and projected images; while the size of images should around 60-80 inches.

25. Can the projector related apps be upgraded online?

No, U-disk upgrade only.

26. How to upgrade the projector software?

a. Understand the format and capacity of the U-disk (Format: FAT32; 9-32G)b. DO NOT operate the device/cut down the electricity while upgrading. Please refer to the provided guide video or manual.

The general guidance is as follows:

1. Unzip the files when receiving it and save into the U-disk (Format: FAT 32; 9-32G) instead of into a folder;

2. Switch on the power and plug in the adapter ( or power cable);

3. Upgrade will be automatically triggered once the power is on (some may need to go to 'settings' - 'local upgrade' to get updated);

4. Power will be switched on automatically once the upgrade is done.

27. What's the power supply voltage of the projector?

The available power supply voltage is between 100v - 220v.

28. Is there only one built-in speaker inside the projector?

Normally a small device comes with 1 speaker while a larger one comes with 2. Details can be referred from the corresponding specification.

29. Does the signal received by the remote control will be affected if the IR rear interface from the projector is blocked?

There are normally two IR receivers (front&rear) inside the device. Pointing at the device and the images are both available for remote control to receive the signal.

Normally a small device comes with 1 speaker while a larger one comes with 2. Details can be referred from the corresponding specification.

30. How much the brightness scale is appropriate if the projector is with the solution of 720P? 

The brightness standard of a projector is presented with ''LM''. 'Lux' may refer to illumination level which normally measured 30cm away from the lens. Normally, 100LM is in accordance with 4500Lux, and 200LM corresponds to 9000Lux.

31. What's the framerate when projecting a video with 1080p? 

a. The default refresh rate of our projector is 60Hz which is adjustable.

b. There are differences between framerate and refresh rate. To put it simply, refresh rate functions on the projector while framerate applies to the game graphics card. The fixed refresh rate of the projector is 60Hz which has nothing to do with the graphics card performance. However, the higher the game framerate, the better the graphics card performance.

32. What is the power of the projector?

The power of our device in a small size is about 50W while 150w in large size.

33. Can the device recognize USB 3.0?

Our projectors currently support USB2.0 rather than USB 3.0.

34. Does it require a more capacity to connect to the SD card?

The maximum capacity comes with 32G.

35. What is the degree of Electronical Keystone Correction?

The angle of keystone correction varies from ±30° to ±50°. You may check from the specification accordingly.

36. How long is the power cable of the projector?

The versatile length of US cable is 1.5m. You may check from the specification accordingly. 

37. Which kind of power cable is compatible with each other?

a. First of all, the power cable we provide for a smaller device is normally in shape "8“ (see the picture);

b. In addition, the power cord plugs of each country are different, and the power plugs of the same country can be Shared

38. How long is the HD wire of the device?

Our general United States standard HD wire length is 1.5 meters. Details can be referred from the specification of the corresponding machine.

39. Is the remote control versatile to our company's other devices?

Most remote controls of our company are shareable. Only a few have an extra button for electronic correction. More details can be referred from the corresponding product engineer.

40. How to deal with the failure display of videos when screen mirroring?

a. Because the APP developer has set copyright restrictions, the video cannot be decoded and transmitted on the same screen.

b. Customers can use the Fire TV Stick or TV Box to play copyrighted apps via HDMI.

41. Solutions to failure or unstable wifi connection.

a. The projector does not support 5G network. Ensure it is 2.4g network or customers can try to connect it by using mobile hotspot (please refer to the instruction video for connection method)

b. Because of the system response delay, it is suggested that exit the Settings and re-enter it, should the connection be successful.

c. If the WiFi list is not found, it may be the problem of WiFi module, a new one should be replaced for the customer.

d. It is suggested that close to the router to re-test or the customer restore factory Settings to reconnect

42. Solutions to the projector that cannot play Youtube videos.

A. Youtube APP is a lightweight browser that opens native YouTube videos, and we're a Linux operating system, not as powerful as Android.

B. Due to the reason of 1, APP background maintenance will always do relevant restrictions and filtering; Some video sources have copyright restrictions, which are based on the publisher of the video;

C. Customers can use Fire TV Stick or TV Box to play apps with limited copyright via HDMI

43. How to download google play store on a projector?

A. The operating system is Linux, which cannot download and install apps like the Android system

B. Customers can use Fire TV Stick or TV Box to play copyrighted apps via HDMI



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