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Old 07-12-2014, 03:10 PM
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DIY: how to replace the screen on RHB MyGig 430N

Here's my write up on how to replace the touchscreen door assembly on the RHB 430N headunit.

If you managed to crack the screen on your RHB, this is probably the cheapest way to fix it.
If you have any experience with basic disassembly of electronics (such as adding memory to a PC), this will be an easy DIY job too. You can take a look at this guide to see if it's something you can do.

I didn't get any instructions with my replacement door, and I googled and couldn't find any DIYs for the RHB.
I tried to use the allpar guide for the REN. It is completely irrelevant and useless for the RHB. I ended up disassembling the entire headunit, only to find I really didn't need to. Hopefully this guide will save you a lot of time and maybe some frustration.

This might be a good time for some disclaimers: Follow these instructions as your own risk. This is my experience with the RHB from my 2012 Grand Cherokee and I got it to work perfectly, but YMMV.

So with that out of the way, let's get started…
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Old 07-12-2014, 03:13 PM
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Re: DIY: how to replace the screen on RHB MyGig 430N

Parts
The first thing you'll need is a replacement door assembly, which includes the screen.

I got mine from tturnas on ebay (tturnas on eBay), aka screensurgeon.com. Price was $325 shipped in July 2014.



Tools
You'll need several tools to do this job:
- trim removal tool (the thinner, the better)
- 7 mm socket or nutdriver (for the WK2 JGC/Durango, may be different on other vehicles)
- T8 Torx bit (and bit driver) -- you can find these in a "security bits set"
- #2 Phillips screwdriver
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Old 07-12-2014, 03:14 PM
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Re: DIY: how to replace the screen on RHB MyGig 430N

Headunit removal

The first stop is to remove the trim piece surrounding the RHB and the HVAC controls.
Here's a pdf how to do that: Jeep Grand Cherokee WK2 - Interior trim removal
I needed to use the thinnest trim tool I had to fit in the panel gaps.

The HVAC control panel will stay attached to the trim, and disconnecting its wiring will give you a lot more room to work. There are two connectors. Push on the release tab while pulling the connector out.


The RHB is held in place by four screws, one at each corner. The WK2 JGC and Durango use a unique version of the RHB, where the screws are in the upper and bottom corners, while other vehicles have the screws on the side.
For the JGC, use 7 mm socket. In this pic, the two bottom screws have already been removed.
(And yes, I took this picture after replacing the screen)



There are 5 connectors to unplug from the RHB. For some reason that mustard color one was a real bitch.



This is what things will look like once it's out:

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Old 07-12-2014, 03:15 PM
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Re: DIY: how to replace the screen on RHB MyGig 430N

Disassembly of RHB
Now that the RHB is out of your vehicle, it's time to take it apart.

First remove the top of the RHB. There are two screws on top (in the picture below, the green arrows point where they are located). Then GENTLY pry the top off, and there are little slots where you can insert a small screwdriver. The top is hinged and will swing up, like so:



Once the lid is off, you will be looking at the dvd player. That's the next to come out. It's held by four screws, two on top and two on the back (the two back ones are already removed in the second picture):





The dvd player will need a little jiggling to lift out. Once it's free, don't lift it too high as there are two ribbon cables. Flip the dvd player upside down to the ribbons' side, and you will see the ribbon cable connectors. The picture below shows one connected and one disconnected for comparison:



To unplug a ribbon cable, GENTLY slide the dark gray piece using both tabs found on each side of the connector. If you're not careful, you can easily break that gray piece. Once open, the ribbon will easily pull out.



With the dvd player out of the way, this is what you'll see. That green arrow is pointing to the touchscreen's ribbon cable. And whaddaya know, Mitsubishi parts are still found in Chryslers.



Close up of connector. (Nevermind that the printed circuit board (PCB) is missing, you won't need to do that – I really did take the entire thing apart)



To open this connector, rotate the brown lever down and take the ribbon completely out of the connector (I left it in for demonstration). Just leave the ribbon cable there for now – when you pull the door out, it will take the ribbon with it.

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Old 07-12-2014, 03:16 PM
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Re: DIY: how to replace the screen on RHB MyGig 430N

Removing touchscreen

Now it's time to remove the door and the touchscreen with it. But before that, let's take a look at how the door fits into the RHB.
Manually open the door assembly. The easiest way I found is to GENTLY pull from the bottom like a desk drawer without a handle (blue arrow). You'll feel some resistance. The green arrow is pointing to one of the Torx screws you will (eventually) remove.


Now look at the replacement door. The picture below shows where those Torx screws will go (green arrow). Also notice the one peg (red arrow) on each side.



This is what your RHB eventually look like. You can see the drawer slide type mechanism which causes the door to open and close. That's why pulling out on the bottom of the door is the easy way to open the door. Again, green arrows for where the Torx screws go, red arrows point to the grooves for the pegs.



OK, now go ahead and remove those Torx screws using the T8 bit.

Once the screws are out, rotate the door so the pegs come out of their tracks. The door should now be free from the headunit. Pull the ribbon connector through (this picture also shows the PCB missing which, again, you won't need to do).

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Old 07-12-2014, 03:17 PM
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Re: DIY: how to replace the screen on RHB MyGig 430N

Reassembly
Basically just reverse disassembly.
I gave each ribbon cable a light tug to make sure they were fully seated and the connector was locked in place. But be super careful with the ribbon cables – if you damage one, you are seriously screwed.

Also be careful with the Torx screws. They have a very fine pitch and are easy to accidentally cross thread.

If you mixed up the silver screws, the two longer screws belong to the top plate, the four shorter ones are for the dvd player.


Testing
After you put everything together, the clock will at first say the time is 7:59, which will change to 8:00 in a few seconds. Take your vehicle outside so the RHB can establish a GPS connection, and it will update the clock automatically after about four or five minutes.



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Old 07-12-2014, 03:28 PM
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Re: DIY: how to replace the screen on RHB MyGig 430N

Conclusion

I hope someone finds this DIY helpful. I've gotten a lot of useful information for various forums for the different cars I've owned, and this is my way of contributing.

This DIY might also work for the RBZ, which shares the same door, but I'm really just guessing here.

Now go have a celebratory beverage for not having to pay the stealership $2000 for a new RHB! Anyone want a cracked screen? Makes a great paperweight.
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