Hardware Intermittent power issue with old model 3DS XL

[grafate]

So backstory on this was it was working well for 3 years. Then last Thanksgiving weekend it didn't turn on. So I bought a new one for my son and left this older XL in the closet till last month I found it. I was about to trash it but decided to press the power button and it turned on. However later that night it would not turn on again.

After 5 or 6 weeks I found out by accident that when it sits and nobody touches it, it will turn back on after sitting for around 5 to 6 days. And it will continue to turn on if back to back power off then back on. but once it sits for more than say 2 to 3 hours after turning off it won't turn back on and you have ot wait 5 to 6 days again.

What I tested so far was using a new battery so I can eliminate that. Any ideas what else it could be?

 

[Dionicio3]

Try taking the whole 3DS apart and look at the motherboard. I'm no good with 3DS hardware, but if you show a picture I might be able to point out obvious differences.

 

[Byokugen]

So backstory on this was it was working well for 3 years. Then last Thanksgiving weekend it didn't turn on. So I bought a new one for my son and left this older XL in the closet till last month I found it. I was about to trash it but decided to press the power button and it turned on. However later that night it would not turn on again.

After 5 or 6 weeks I found out by accident that when it sits and nobody touches it, it will turn back on after sitting for around 5 to 6 days. And it will continue to turn on if back to back power off then back on. but once it sits for more than say 2 to 3 hours after turning off it won't turn back on and you have ot wait 5 to 6 days again.

What I tested so far was using a new battery so I can eliminate that. Any ideas what else it could be?

I would call the Mystery Machine on this one! Sounds spooky
I think you have a fuse problem, or even the battery