My 3DS won't turn on

I have had this console for at least 8 months, and it died on me. It was working fine too before it broke. No blue light would appear when I pressed the power button, and when I charge it, the orange light appears, then later dies after a few minutes. The weirdest thing about this error is when every once in a while, the New 3DS would boot on, and the battery would say that it's 3 bars full. Then after like 10 minutes, it shuts off automatically. What can I do to fix this issue? My DSi also died the same way, before the 3DS broke. I even changed the battery, and that still doesn't fix it. I want to deconstruct the 3DS, and see what's wrong, but i'm scared that i'll break the console. Is there a solution to fix this issue, or do I have to buy another one?