Question about Optoma EP749 DLP Projector

2 Answers

After start up and connection the image begins to display noise and lines. The image "noise" becomes increasingly severe as the projector warms up until the entire picture is distorted with snow and flashing, blinking distorted image. The bulb and cable are fine as both have been switched out and the problem remains the same. Connection to different laptops yields the same problem. The image is better with cool down and reconnection but does not last long. The projector is lightly used and very well cared for. Thanks

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  • mathompson62 Oct 07, 2010

    I am afraid that I tried all of these solutions. Set up the projector first before connecting. Rescanned for input. Reset monitor selection, turned off the laptop screen, change cables and alternated between VGA and HDMI cables. Still got the same problem.

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2 Answers

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  • Optoma Master
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The fault seems centered on to the DLP(digital light processor) , it can be the fault off the dlp or the relative circuit to the dlp.
Now this being a very sensitive circuit it will be necessary that you can concentrate to check on the outside.
Since the lamp and power was identified to be working perfect, the fault can be the mother board.
Now remove the mother board fittings, reset all connectors making sure that all connections are in order.
If the fault is staying on , you must try to swap the mother board/DLP unit. Possibility that there is an errors in the processing is quite high and must be confirmed by this swap...Please try this somehow as it is best to test to confirm before you replace. Contact Optoma if the working hours are less then 1000 hours or six months as it is covered by warranty.
Finally make sure that all the settings on the menu , brightness settings etc are correct.


Get some help on dlp projector repairs from the site below:

dlp
-projectors.html">http://www.ehow.com/how_5510388_repair-dlp-projectors.html


The advice/tip given is with the belief that you are competent. You must attempt to do it yourself only if you are technically/logically able, especially when dealing with delicate devices, damaging while trying to open, Probing electrical/electronic circuits with high voltage or delicate components. Since the advice given by me is with the inputs provided and not based on a visual inspection, there can be further reviews required in some cases.

Posted on Oct 07, 2010

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  • Master
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Hello,

Upon setting up your equipment it is very important that you turn on the projector first. You will see a blank projection image, now turn on the computer, (confirm your cables are connected properly). When using a lap top computer you may need to disable your computer's display screen. First locate the "function" key at the top of your keypad that reads "LCD", "CRT" or it may have an icon that resembles a computer monitor. By pressing the "FN" key and the corresponding "function" key you will be able to obtain the image from the projector only. This is known as "toggling" the image. If the problem still persist, replace the 10m HDMi cable.

Take care.

Posted on Oct 07, 2010

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2 Answers

Why can't I find the connect to projector option?


Connect your Projector to PC Computer

Connect to projector

How to Connect Laptop to Projector

How to display computer image on TV or projector
How to display a computer image on a TV or projector All modern televisions and projectors have one or more ports which allow them to receive and display an image generated by a computer. Both desktop and laptop computers are capable of connecting to a TV or projector, provided that they have the appropriate cables. The following sections contain instructions for using your TV or projector as a computer monitor. For best results, we recommend reading them in order.
Identifying available connections
Connecting computer and projector or TV
Display using Desktop
Display using Laptop
I don't see an image on my TV screen

Identifying available connections The first step in connecting your computer to a TV or projector is finding an identical port on both machines. Once the matching port has been identified (one that is the same on both your input device and output device), you need the appropriate cable to connect them. This section contains a picture of the back of an Epson projector and its available connection ports; as well as descriptions of each.



find-connect-projector-option-vga-hdmi-zonwsocbr3qazne24mugrpvs-1-0.jpg
HDMI
The HDMI connection is very popular among display electronics. In fact, nearly all modern televisions and projectors feature HDMI ports. Most laptop computers support HDMI and it is becoming more prevalent on both desktop as well; even without a high-end video card. HDMI is quickly becoming the standard for all electronic equipment for its high quality signal and ability to carry both audio and video signals. The image to the right is that of an HDMI cable.


find-connect-projector-option-vga-hdmi-zonwsocbr3qazne24mugrpvs-1-1.jpg VGA
The VGA connection is the most common among both desktop and laptop computers, is found on most projectors, and some TVs. The VGA cable has a 15-pin connector on each end that plugs into a VGA port on each device. Due to the fact that most televisions do not support VGA, we recommend using HDMI for their wider range of compatibility.


find-connect-projector-option-vga-hdmi-zonwsocbr3qazne24mugrpvs-1-2.jpg Tip:VGA cabling is universal for devices that support it. For example, the if your desktop monitor that uses a VGA cable it, that same cable can be used by a laptop to connect it to a projector.
Note: If you are using an Apple desktop or laptop you need a VGA adapter to connect a VGA cable to the computer.

DVI
The DVI connection is newer than VGA and it offers a sharper image. Although the DVI port is not shown on the Epson model above, it is still somewhat common for projectors, not so much for televisions. It is mostly found among desktop computers for monitors, but some laptops have DVI connections as well (Apple laptops are more commonly known to support DVI than any other brand of laptop). Since finding DVI on a TV or projector is more difficult, we again recommend using HDMI cables.
Tip: There are special cables that convert from DVI to VGA or DVI to HDMI and vice versa.


find-connect-projector-option-vga-hdmi-zonwsocbr3qazne24mugrpvs-1-3.jpg
Composite Video
The composite video connection is quite common on a TV or projector, but it is nearly nonexistent on modern computers. This connection is the yellow female cable on what is normally a three bundle of red, white, and yellow. The only time you should see this setup is on older video cards for desktop computers.
S-Video
The S-Video connection is also commonly found on TVs and projectors, but solemnly on a desktop or laptop computer. This connection is a small step up from composite video, but is nearing obsolescence.

Connecting computer and projector or TV After you've identified what connections are available on both your computer and TV or projector, you're ready to connect the cables. If the same connections are not available for both the computer and TV or projector, you'll need to purchase a video converter cable that converts one signal into a compatible signal.

Desktop Computers For a desktop, you simply need to plug the cable into the computer and output device. If you don't see an image, you may need to change the display using the following steps.
  1. Press the Windows Key.
  2. Type Adjust screen resolution and press Enter.
  3. Find Display and click the down arrow on the right-hand side of the box.
  4. Select the appropriate output device.
  5. Click Apply then OK.

Laptop Computers If you're connecting a laptop computer to a TV or a projector you'll often need to "send" the video signal to the display device. The key sequence to do this varies depending on the laptop; but usually it's either: Fn + F3, F4, F5, F8, or F9. For example, pressing and holding Fn + F3 at the same time on my laptop sends the video signal to my connected TV instead of the laptop's screen. The corresponding key used with Fn may be labeled as CRT/LCD or have a picture of a monitor on or close to the key. Additional help and information with switching the laptop display can also be found on the link below.
Switching TV inputs Finally, if you're connecting a computer to a TV make sure it has been switched to the correct input. For example, if you connected an HDMI cable to your computer and the "HDMI 2" port on your TV, you'll need to switch to the "HDMI 2" input. This action can be accomplished by pressing the input button on your TV remote until the correct image is displayed.

Jul 14, 2015 | Computers & Internet

1 Answer

Can't bring into focus the entire image. Corners defocused and have green/purple halos.


If it is a known problem, then it is a manufacturing error. They have just admitted that is a MISPLACED washer. Have Optima repair it free of charge.

Mar 28, 2017 | Optoma Office Equipment & Supplies

1 Answer

My optoma projector has a green tint


it may just need a service, as all DLP projectors need to be cleaned internally as well as LCD.
DLP projector images will flicker and lose colour also may shut down if it is very dusty inside.

Jan 28, 2013 | Optoma Office Equipment & Supplies

1 Answer

Lines on screen


The screen has a connection for each line on the display and the soldier on some of these connections has gone intermittent. When the unit becomes warm enough, the soldier expands and the connections become more consistent.
If you're skilled, this can be repaired. If not, either replace the unit or take it to a reputable technician.

Nov 01, 2017 | Jensen VM9424 Car Video Player

1 Answer

IXD 420U projector takes a long time to project and has pink ima


If possible, try to replace the VGA cable between the projector and the computer. A bent or broken pin, or a damaged wire, can prevent the blue or green (or both) portions of the picture from being displayed. The result is a reddish/pinkish picture.

As for the long time to project an image, this could be an extended warm-up time. How old is the bulb in the projector? Does the projector have an option to display the hours used and/or remaining on the bulb? Bulbs do have a finite life, and when they near the end of their service life, they can become more difficult to start.

Hope this helps!

Feb 22, 2010 | Office Equipment & Supplies

1 Answer

When I connect a Lenovo w500 laptop - using windows xp - the screen of the laptop becomes magnified and the the image from the projecttor reflets same magnifacation - when I disconnect from projector and...


You don't probably, your laptop screen is not exactly becoming magnified, the resolution is being lowered to match the maximum resolution of your projector which is only 800x600. They are setup as "cloned" together. You could try setting up an "extended desktop" rather than having the projector "cloned" with your laptop screen, that way you can change the resolution (within their allowed limits) of both displays independently. To do this, Right click on desktop and select video setting or the control panel of whatever video card you have. If you can set up an extended desktop, it is here that you'll be able to do it.

Jan 10, 2010 | Lightware VP 800 Plus Multimedia Projector

1 Answer

Monitor Display on TV


Try the following:
Power up the projector first. With the laptop hooked up but not powered on once projector is warming up begin booting laptop. If there is still no display once its projector is fully warmed up and laptop booted you can try using the (fn) key with the laptop monitor switching function key usually F4 which switches the display monitor to show on external, external and laptop or just laptop. If this all fails try changing resolution of laptop to something that might be more projector friendly.
Let me know how you go.

Mar 23, 2009 | Dell Inspiron 6000 Notebook

1 Answer

Hy, having problem with to conect projektor to the computer Anybody can help


The projector should have a cable similar to the monitor cable that would normally be hooked into the computer. The cables work the same and the one coming from the projector will use the same port as the normal monitor cable. Make sure that there is a good connection on both ends -sometimes one or the other get moved and the connection is lost.

Once the cables are hooked up, the projector should be turned on. Normally the projector will soon begin a startup routine and will cause an image to be shown on the screen. You can focus the image during that time.

After the image goes away you should be able to display whatever you want from your computer's software.

Normal problems in doing this are: leaving the lens cap on the projector, having a burned out bulb - once the power is turned on for the projector, it should cause the bulb to come on. Some models have a power on switch and a display on switch that must both be pushed to make the bulb light up.

Hope this helps.

Dec 26, 2008 | ASK Proxima C160 Multimedia Projector

3 Answers

Thin vertical line appears on projector


I have found that vertical lines that suddenly appear from projectors are due to poorly connected cables. Sut off your projector and wait for the fan to go off. Then unplug the connectors from the computer to the projector and secure them again, making sure to go all the way. Hope this helps.

Nov 25, 2008 | Office Equipment & Supplies

2 Answers

PJ458D Displays Multiple Lines and scrambled picture


White noise-the image you get when you turn your television to a channel that isn't receiving a signal. Sorry, this is an old term for on-air televisions. Its kinda the same image you get when your DirecTV signal gets scrambled during a thunderstorm.

Sep 20, 2008 | ViewSonic PJ458D Multimedia Projector

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