(I did not see this forum area so I guess I'll repost here... I posted a minute ago in DS/DSi. I'm not intentionally spamming...) — My DSi has (a) loose connection(s) inside. The screen &/or power connection is loose. I know how to open it but need to know what plugs to check out once I'm inside. Sometimes it turns on if I move it around. Sometimes (when it on, obviously) the screen works, is colorful and stripy, or is all white. It did that and then came back on and it worked for a day. Now it's off again. I am not going to pay for a professional repair as I've owned this thing 2+ years and it has a low value now. PLEASE reply if you know anything about this (no need to tell me not to ["it's too risky"]). THANK YOU.

Google is your friend — there's two youtube videos right underneath the official Nintendo link that show how to replace a DSi screen.

Thank you. I do know how to fix the screen from videos but I really don't believe the screen is the root problem. It's buttons, power, screen... Everything but the sound has been going screwy off and on! My DSi's back on again and I'm writing on it... I know it's not long 'til another freaky thing happens to it. :-/

There are other videos straight-up showing how to take apart a DSi... perhaps one of them will help? that way you can at least see what connections you need to check. If you've made a habit of opening your DSi to poke at its innards, you may have knocked a wire loose that needs re-soldering or something if things are indeed spotty with it.

Thanks again for your help. I've actually never opened it, but I figured from the videos I could open it if I had to. I'm wondering if it's my 2+ year old battery. My DSi no longer keeps time and my date and time reset itself to Januray 1st and 0:00 recently, along with my birthday to Jan. 1st. And it doesn't usually stay on even on full charge unless it sits off for a while or if its just been charged. But would that make the screen go crazy? (It looked like a cracked LED laptop screen on two separate ocasions.) I'm writing on my DSi, but it may not last (it turned off during my last attempt to write.) I had to press it on a lot to get it to come on. I wrote to Nintendo but they told me to call so I'll do that, but if you have an opinion on the battery problem and the screen that would still be helpful. My AC charger broke so I'm using an unlicenced car charger and I'm afraid that may have hurt the DSi because my MP3 player broke from a Dollar Tree car charger a few years ago. :-/ I'd get it and the buttons repaired and replaced but I may just have to get a 3DS when I can and take $30 for this thing since it's $60 each repair...

BTW, stupid question, but... I think I want the black 3DS if it is metalic and sparkly like the rest? LOL Thanks!!

Yes, yes it is

I only use licensed products and never void my warrenty. I take good care of my systems, only having the bad DSi L/R button issues. Send it to Nintendo, or do it DIY as a last resort.