(Topic ID: 288059)

JJP Can we talk about Replacement LCDs?

By happyclan

3 years ago


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#81 3 years ago
Quoted from Vitty:

I’m in on a couple as well if it all works out! My Wonka and guns are not looking nice flanking my pirates CE monitor

Ditto

#82 3 years ago

Bumping this thread to see about alternative panels in the JJP machines (which fit)? I did some self-induced damage to one of mine, and ordered the same stock part number from China (it's the same panel that comes in an all-in-one Lenova PC, no US resellers have it, and JJP wants $600 but it probably includes the entire assembly). Would love to know if any replacements fit (and look better!).

#88 3 years ago

Got my M270HVN02.0 from China. Simple swap other than the light strip at the bottom. Cable goes from a 2 pin plug, soldered to the light strip +/- on the original display, to a 6 pin configuration I’ve never seen on the new display. Comes out of this port (circled) on the control board. Any ideas?

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#91 3 years ago
Quoted from zaphX:

I'm a little confused about what is what.
Have you got pics of the original LCD setup compared to the one you bought?

I'll try to explain, but everything is back together now, so can't take any new pictures. For the record, I'm in this for hobby now, because it wasn't a simple swap, I just ordered the replacement assembly from JJP, but as I'm and intrigued tinkerer (and have a monitor from China that I don't want to send back!), I'm going to try to see this through...

I bought the M270HVN02.0 from China (I have a missing pixel on one of my JJP games that was likely self-induced during installation). That was the serial number on the back of the bracket holding the LCD screen. It appears to be the exact same panel, the only difference being the way that the LCD backlight is powered (the LVDS cable is the same). The one that came with it, has a red/black pair (that you can see in my picture) that is soldered to the power of the backlight strip (it runs into a hole in the corner of the back metal panel of the display), and it plugs into the control card. The new one, has a tiny 6-pin connector, which is presumably the backlight control (LVDS is the same). So it appears the spec on the monitor has changed. So what to do... On ebay, I found a controller board which is compatible with the new display (and the 2.1, 2.3, and about 200 other displays).
ebay.com link: HDMI DVI VGA LVDS LCD Controller Board For M270HVN02 0 1920x1080 LED Screen

This ensemble doesn't have the simple two wire power to go to the LED backlight (like the one that came on the pin), but it does have a connector to an inverter board (I don't know enough about the electronics to understand why an inverter board is needed, assuming to condition the power), which then has a wire that will go out and plug into that small 6-pin connector on the back of the new display. I don't know if any of this will fit on the mounting posts on the JJP bracket (stuck to the backside of the display), but I think I can either 3d print or buy some plastic posts with stick on the button (presuming this solution/display is any better than the stock one from JJP).

That's what I know so far! happyclan is on a similar path, and he'll probably get his China order before me.

1 week later
#93 3 years ago

I’m waiting for the compatible control PCB from Hong Kong. Should be soon I hope.

1 week later
#98 3 years ago
Quoted from happyclan:

I've got my panel and lcd driver board. I need a different inverter board for my panel's LCD. more accurately I need a cable for the inverter but bought a whole new one...a cool $9. Probably going to add another 2 weeks as it slowboats from China.
Once I get this whole thing strung together with vinyl tape, the sucky part will be figuring out how to mount the boards inside the JJP chassis. I'll try to get as much grounded but will probably have to go to vinyl adhesive standoffs.

I’ve got an update as well. The board I ordered has all the right connections (inverter and cable), but..... the monitor I have, is the same size visible screen, however the bezel is materially smaller. Ugh. So no direct replacement into the JJP mounting hardware. I’m thinking about printing some some blocks that I can wedge in and maybe use some gorilla double side tape to hold it in. Custom brackets would be nice or some really long (and thin) screws not sure if they exist. It’s about 5-10mm per side/top/bottom.

In the mean time I got the replacement from JJP and it came assembled and took 5 mins to swap in. And it seems much richer in color (less washed out) than the old one.

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1 week later
#102 3 years ago
Quoted from happyclan:

Alrighty gentlemen. The parts have all arrived and I got to testing. Here's the setup:
LCD driver - T.M3663.81 (find on AliExpress)
Panel - AU Optronics M270HW02 (find on Aliexpress OR rip one from an IdeaCentre A270)
DC Adapter - 12V 5A
Panel looks boss. Pictures don't really do it justice and the lighting is different. But the replacement panel has real black. It's awesome. I need to figure out a way to mount the new LCD driver and supply power. I'm not sure what the DC power supply in the machine is rated. I want to say it says 10V on the custom chassis.
Note: I haven't tested whether the JJP controller can drive this thing. If so, then this project just got really easy.
I'll keep you posted. For me, my mind is made up seeing them in person and the replacement wins.
[quoted image][quoted image]

So I’m at the same place you are, but the problem I had is that the bezel on the new monitor is so much smaller, it doesn’t mount properly in JJP’s mount. Have you tried this yet? I think I could make a part (bracket or print) to make it fit.

As for mounting the controller board, I agree with your PM, to just route the hdmi cable in there and mount the board with a 3D print, or post sleeves with double sided tape. Won’t be pretty but who cares.

#104 3 years ago
Quoted from happyclan:

What is your panel model number? I haven't tried going into the JJP bracket yet.

1PC new M270HVN02.0 All-in-one PC screen 27 inch LCD screen

#106 3 years ago
Quoted from Kare9:

Are the bezels removable? I remember ordering replacement panels for laptops and typically you would have to remove the bezels and swap them over to the new panel in order to install.

Bezel might not be the right word. The silver metal surrounding the screen and I do not believe they are removable. I posted a picture a few back I believe showing the issue.

1 week later
#114 3 years ago
Quoted from happyclan:

Sooooo. I popped in the new panel. It's daytime, so I figure I'll wait for the sun to go down. I used my NEW panel and the OLD board.
In the meantime, I take JJP panel and pop it into an old office machine that I'm going to resurrect as a headless server (now with head maybe). Anyway, I notice the JJP panel looks pretty damn sweet. Hmmmm.
Sun goes down. Guess what? Display looks as bad as it did before! Turns out it's looking like the driver.
I pop new driver (one I said above) in. Looks great. Great I say. One problem. Display doesn't power on when the machine powers on. I have to hit the "on" button on the board. Good gravy.
Now I'm back to either (1) finding a new driver board or (2) finding a hack to turn it on when the CPU power rail fires up. The takeaway is JJP probably shipped an okay panel with a sucky board. I'm off to aliexpress. At least I fixed my office machine.
RobbyIRL5 what's going on with your world? Did you get that bezel sorted?

I haven’t worked on it.

I have it all ready to, but bought a replacement monitor from JJP so now my experimenting is just for fun (or until I need another). I can pretty easily figure out if it will auto power on though if that would be helpful, see if my control board is different.

I don’t think the original JJP board will be compatible with the new monitor which has that 6-pin plug.

2 years later
#135 10 months ago

This is an old thread, so my memory is a little outdated on it, but I ordered boards and monitors (from China) and I believe I rebuilt a solution, but also ended up just getting a new one from JJP because it was way more challenging than it should have been to try to rebuild on my own.

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