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Discussion Starter #1
Hello everyone! First I wanted to thank everyone on this forum over the past years for all the help with common issues for the MDX. There's one thing that I can never find a fix to which was the flickering nav screen. Mine use to flicker and is now just black. The only solution on here was to send it to Alpine which I felt wasn't worth the cost. I finally took it upon myself to take the nav unit apart. After much work, including soldering connections I thought were bad, I took it apart to the point where I located the backlights to the unit. There are 2 backlights, specifically CCFL flourescent lights attached. Indeed one end of each lights was black/burned out, causing the other end to flicker and then eventually burnout on both ends causing the screen to go black. Once I found this out, it took me awhile to figure out the specific name for this backlight and once found, I found it on amazon. It hasn't arrived yet but will definitely update once I have the new backlights installed!
 

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I am having a similar issue. I did take the unit apart to look for solder breaks, but did not think of the back LCD bulb as it would flicker on occasion, would you please do let me know the part number that worked for the LCD backlight?
 

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That is great! Definitely keep us updated. Mine was flickering for a while and then it went completely black.


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Discussion Starter #6
Update: Turns out the amazon link I posted sent me backlights that are smaller than the nav backlight. It measures 5.5" when the backlight we need is 6.5" long. Currently working with the company to get the correct lights as they said they don't have a complete setup like the one shown on amazon but they do have just the light and I would have to solder the wires on. I said it's fine so now waiting again for the correct lights.
 

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Thanks for the update... please continue to update us. Have you checked on eBay for the bulbs?


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Discussion Starter #8 (Edited)
Ya, ebay has poor selection. I'm currently speaking to the company directly in order to get the correct length and diameter. Which is 160mm in length and 2 mm minimum diameter (measured in cm then converted to mm). The one that this company has is 2.2mm by 160mm. I'm hoping 2.2mm will fit inside the screen as there is space for it. I will have to measure the opening the backlight goes into just to be sure. Once everything works out, I will post the link for the correct backlight. Will update soon.

Edited: removed rubber ends and measured again
 

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I'm also looking forward to this. My screen works but is very dim. I'm gonna consider doing a proactive replacement if this works out for you, to see if I can bring the brightness of mine back to visible in sunlight.

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Discussion Starter #10
Just a quick update..I received the correct ccfl backlights, although a little skinnier than the original, it's still the same length. Soldered them on the wires and put everything back together. Well, screen still flickering at night and black in day. Did some more research as I'm positive it's the lights that are indeed flickering as I kept everything connected but screws off to see the backlights as I turned the mdx on and read a few articles about the inverter for the light to be defective. So now I'm looking at the circuit board trying to figure out which inverter is for the lights. The lights are supposedly flickering/burned out due to a bad inverter not allowing enough current to power the lights. One step closer to figuring this out.

If your screen is black and you flash a light on your screen and can see faint images, then your inverter is the problem.
 

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Thanks for the update.. so do you believe that the original bulbs were fine and the problem is the inverter?


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I still think the bulbs were burned out. I can't seem to figure out which inverter is for the lights. Going to contact a circuit board specialist later on today to see if he knows or if I should drop the unit off for him to look at. If that is the issue, I will purchase a new inverter and solder it on. I will update once done as I am very committed to finding out what's wrong. Fingers crossed 🤞
 

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Discussion Starter #13
Just a quick update as I didn't want to keep everyone waiting. I sent my nav system to have the circuit board checked and turns out everything on the circuit is fine. The guy did mention that a bad ground could cause flickering or the system to not work. My negative battery terminal was loose so I went to autozone and got new terminals. Proceeded to find as many ground wires as I could and sanded them down with my dremel. Found a few to be corroded/frayed and left them for now. Sanding did remove corrosion from the connectors and after starting the car, the nav screen stays on only on the lowest night setting. If I try to go brighter, it will flicker. As I was changing my sway bar bushings today, I found another main ground from the bottom connected to the transmission which is also corroded/frayed. I will be going to pickup new ground wires tomorrow and update accordingly. One wire connected to the body from the top down to engine and the entire negative battery cable.
 

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