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The Nintendo DSi is the third iteration in the Nintendo DS line, and made its debut in Japan in late 2008.

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Bottom screen colors become dull over time?

It's not a life-or-death situation since it isn't my main console anymore, but one day I was fiddling with the ribbons and noticed two tiny screws(or resembled screws) on the SD Card ribbon (the ones that are visible just above the battery when you pop out the cover), and lost them. The touch screen works perfectly, but the colors on it gradually become dull to the point that the palette almost looks photo-negative, and is hard to see. Is there some way toto replace the small metal discs that were previously there?

For clarity, this is the affected area:

Block Image

EDIT: Previously, I had tried to insert a small piece of rolled-up aluminum foil, and poked it through the holes so it touches the tiny contacts on the small circuits, and have had success as the colors go back to normal when I press down on the battery cover, but I need a more reliable fix.

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Sadly, this happens to my dsi too. i cannot help you, but your photo may help me greatly. thank you.

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(Not a very helpful) ANSWER: If you have this problem, try turning these two little screws (circled red on the picture above) with a screwdriver to “tighten” or “loosen” them (in reality, they just turn around), but not with the console turned on! If you don’t have this problem, don’t touch them with a screwdriver! :)

LONG VERSION: I know it’s an old question but I had the same problem and came here by searching for a solution, so here are my two cents…

“LEGAL” NOTICE: I have no electrical engineering skills, just mechanical, I own a lot of Nintendo hand-helds so I do some “first level servicing” for myself (open, clean, replace parts).

I recently got three DSi’s with two of them not powering on and one that could indeed power on but had broken top screen and was in a very sad state housing-wise, so I had to do some transplants.

I believe I made a huge mistake at the very beginning when tearing down one of them I did not look up which screws are to be taken out (“how hard can it be” idiot move: I previously disassembled over a dozen DS lites but this was my first DSi) and I tried to unscrew these two little screws so I turned and turned and turned the screwdriver... Eventually, I realized they weren’t needed for disassembly so I moved on…

Fast forward to what I thought was the end of my build: from those three DSi’s I gathered best parts for a single one (or so I thought), set them in the best housing, screwed down all together, powered on and it was all good, I was happy… for five minutes, then I noticed that the color on the bottom screen is gradually fading and later on screen slowly starts to flicker.

I checked multiple times bottom screen ribbon cable, replaced the bottom screen with another one, it would look good for a few minutes when powered on after assembly (usually took me about 20 mins to replace the bottom screen with all those tiny connectors) but then the fade & flicker would appear. So it wasn’t the screen, it wasn’t the ribbon.

Then I came here, after reading about some stuff which was out of my reach (replacing capacitors)…

I tore down the DSi and took out the SD card ribbon and I “tightened” both of these screws for a few turns, put the DSi back together and powered on. Bottom screen had a washed out look - not looking as good as the top one but passable, and didn’t start to fade or flicker over a course of 45 minutes (I played a Mario Kart Cup and left it running on the table for some more). After that time, I took the console to turn it off and at that moment top screen started to flicker badly (a first!), just like the bottom one would do after that amount of time, but this happened without the gradual fade… Bottom screen did not lose its washed out color.

This caused a great pain in my brain so I tried an easy solution which I was able to try by having the luxury of spares: I took another SD card ribbon cable on which these screws were not touched and put it in… Now my little FrankenDSi works as it should, and out of superstition (and in fear of completely losing it :) ), I am not willing to work on another DSi/this problem for some time.

So, with all that been said, these two screws are SOMETHING (Capacitors? Can’t really tell, they are so small!) and mean SOMETHING, have some settings of their own which we need to find out for a definite answer. Thanks to Omnimatrix10 who posted this question which helped me finish my build, any further help would be greatly appreciated.

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I finally figured it out. The two screw-like wheels are potentiometers, which can be turned to fix the contrast on the screens. There is one for each screen. My original issue was that I ripped them out forcefully (you have to be very gentle and make very short turns!) thinking they were screws. I ordered an SD ribbon cable off Ebay and now it's working great. Thank you so much for your answer! I hope this helps more people in the future

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