O3ds xl blue light on but screen blank

Hi @senorpenguins ,

As you know water and electronics and electricity are not a good mix.

The water causes corrosion and provides circuit paths for the electricity which were not in the console’s operating design and could damage the components.

First do not turn on your console and then with it turned off you need to remove the battery as soon as possible to minimize any further damage.''

Then you need to dis-assemble the rest of the device and clean all the affected parts using Isopropyl Alcohol 90%+ (available from electronic parts stores and some pharmacies) to remove all traces of corrosion and water. Do not use "rubbing alcohol" as in some cases this is only 70% IPA or less, can contain scents and other ingredients and is not as effective. If you do check the label to verify the amount of IPA.

Here is a link that describes the process.

Electronics Water Damage

As always with electronics, especially surface mounted PCBs be gentle when handling and especially when brushing away the corrosion. You do not want to remove any components from the board.

Hopefully after you have done all this the console might possibly work correctly again.

Here is a link to the ifixit guide(s) for repairing your console.

Nintendo 3DS XL

If this process seems too daunting, take your console to a reputable, professional electronics repair service experienced in water damage repair and ask for a quote for a repair. If you decide to do this, do it sooner than later.