Suffering projector white dots on the screen? When you do some google searching with the projector white dots, stuck of pixels or dead pixels, needless to say, you’ll have the answer of DLP chip failure. But do you know which chip will suitable for your DLP projector or Projection TV? In today’s post, I am going to share you how to buy the exact replacement chip to fix your DLP projector or projection TV white dots error. Meanwhile, I will take my example projector to replace the unite with step by step. So that you will have some idea to make your projector. Before we dive into, let’s talk a bit more how does the faulty DMD chip cause the white dots.
How Does DMD Chip Cause The Projector White Dots On The Screen
DMD is a short name of Digital Micro-Mirrors Display. There are hundred thousands of micro-mirrors assembled on its surface. For example, If a projector native resolution is 800×600, the chip has (800×600=) 480000 pcs of individually controllable micro-mirrors. Each mirror can rotate estimated ±10-12° to reflect the light from the bulb through the lens or directed to the heatsink. Every time a mirror controls the reflection of light through the lens, it illuminates the bright pixels on the screen. In contrast, the light is directed to the heatsink and making a dark pixel on the screen. In this case, when a single mirror is broken or stop rotating, the light goes straight to the screen. And display as a white dot (white spot) when it needed to be dark. It just likes the picture below:
Why The DMD Chip Goes Bad
After running a couple of years, your projector would be dusty inside. On the other hand, the hundreds of wattage lamp module produce tons of heat and transfer to the chip. The dust will prevent the heat from dispersing properly. As the day goes by, the micromirrors of the chip become aging fast when it is running on a high-temperature environment.
The chip fails very quick that it starts as a couple of dots on the projector screen for the first time. In a few weeks later, it will turn into thousands of so that you can’t see anything. For this reason, you will need a new replacement DMD chip to fix it.
Wanna know which replacement chip do you need? And how to replace your existing aging unite that cause the dead pixels?
The 8 DMD Chips Fit For Most Of The DLP Projector Or Projection Television
Here are the DMD chips that covered 85% DLP projectors. If your projector is a DLP model, you may need one of these chips to replace for your aging unite while you have stuck pixels. But the question is how you can find which chip fits for your model. Now, There are two methods to verify the chip part number. (This is the secret tip that projector manufacturer didn’t inform) Let’s dive into the steps:
How To Verify Your Projector DMD Chip Part Number
Once realizing you have to replace a new chip to fix the stuck pixels on the projector screen, You may be wondering: How to figure out the DMD part number of your projector is assembling? There are two methods you can find out the number.
Method 1: Tear Your DLP Projector Down
Tearing your DLP projector down and disassemble the chip is the way to realize the part number. Because the number is labeled on the back side of the chip like this: You will find my step by step guide on how to throw things away to get the chip later in today’s post Therefore, I don’t make the disassembling job again. Stay tuned with my step by step DLP projector dismantlement and tips.
Method 2: Find Out The Part Number From The Projector Product Sheet
Every projector comes with a product sheet when it comes out from the manufacturer. We can find our projector data sheet on google with our projector model number. Please follow my step by step guide just in case you miss something and purchase the wrong chip:
Step 1: Identify Your Exact Projector Model Number
Your projector model is the most important information to work out the replacement chip part number. Don’t miss any number or letter from your projector model number. For example, The VIVITEK D825MS and D825MX are using different DMD chip even if there is one letter different from the model number. Don’t try to search the projector number as D825 only. You may get the result of D825MS if you are looking for D825MX. Therefore, the best way to check for the name is by looking at the projector label on the bottom of your projector like:
Step 2: Copy Your Projector Model To Google
When you have your projector model number, search it on google. Most of the time, I will click into projectorcentral.com’s information from the google result. Because they will provide the most detail I need to check for the correct replacement chip. Like the native resolution of the projector, the first ship, and the DMD chip size. Let’s do use Sanyo PDG-DXL2000 as an example again: After Googling the Sanyo projector model, head over to projector central page Check for the first ship time, the native resolution and the display type. Likewise, you can check for the product sheet from the page. But that’s enough data for me to know the chip assembling on the Sanyo PDG-DXL2000 projector. Here it’s the next you need to do:
Step 3: Narrow Down The DMD Chip
It is the best part to narrow down the chip assembling on the projector. Check this out: Compare your projector information with this table below and identify the chip number.
- First Ship Before 2010
- First Ship Before 2010
- First Ship After 2010
- First Ship After 2010
- 1280×720 1280*800
- Same chip for both resolution
- For 1080P Projectors
- For Most Of Projection TV
Example Sanyo PDG-DXL2000 again: Its 1024×768 native resolution, first shipping in July 2010 and 0.55-inch chip size. All these data tell me that I should get the 1076B chip for my replacement. Up to the present time, you are able to buy a replacement chip following the above tips. Next, it is time to do the replacing job yourself.
Replacing The DLP Chip On DLP Projector Step By Step
Making yourself do the replacing job may save you an estimated $150.00 repairing fee. Meanwhile, you can also do the vacuuming and clean the projector. Generally speaking, it is not a difficult thing that almost everyone can make it even if you are a 69-year-old female. My tip for you is taking pictures all along the way when you tearing the projector down. And make sure the pictures to show where you take the screws from. Furthermore, putting screws in labeled cups or containers help you a lot when you re-install the projector. Different from other devices repairing, replacing a DMD chip need only two Phillips Drivers to handle the screws.
Tools Recommended In The Teardown Procedure
As soon as you have the new replacement chip arrives, let’s dive into the procedure step by step. (I will use my Acer X1230P projector as an example to show you processes.)
Step 1 Remove The Lamp Module Assembled On The Projector
Step 2 Take Off The Projector Lid
Step 3 Unplug The Wire Of Mainboard And Remove It
Step 3 Disassemble The Optical System
Step 4 Replace A New Chip To Fix The Projector White Dots Problem
Step 5 Re-install The Parts Into The Projector
To the end that we complete the processes of replacing the DMD chip. The next, We are going to re-assemble all the parts into the projector by following the pictures you take. But here are some attention we need to know:
- Make sure the DMD board is fully seating in its socket. Otherwise, you will see a black screen without any image when you restart the projector.
- Confirm the mainboard is firmly connecting with the power supply. You will not able to start the projector if the mainboad isn’t seated fully on to the power supply.
- Ensure the projector fans direction is correct when you re-install them into the projector case.
- Confirm every wire connector to the mainboard.
Conclusion Of Fix Projector White Dots
Finally, I hope this guide gives you a little help with fixing projector white dots on the screen.
All of the DMD chips and tools links we mentioned above are Amazon and Aliexpress affiliate links which allow me to get a little commission from Amazon and won’t add you any extra cost.
Feel free to click them, some I am able to get a few pence commission that supports me keep on writing guides and post like this.
Furthermore, let us know if you have any further thought on the process of replace the DMD chip.
So that will help more people on this problem.
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