Malfunctioning DS

[General Meow]

I have an original DS that isn't working properly. I took apart the top half of the DS so that I could remove dust from under the plastic screen. It hasn't worked right since then. I turn it on, but nothing comes up on the screens. The power light comes on when I do this, but after just a second, the DS turns back off. Does anyone know what is wrong with it? Did I accidentally brick the system? Is there any way for me to fix my DS? Any answers to these questions would be greatly appreciated, and I thank you in advance for your input.

[KazoWAR]

make sure the ribbon from the mother board to the top screen is not torn or loose.

[darklord]

well is it charged ?

[General Meow]

Yes, the ribbons were loose. I pushed them back in all the way and it works fine now. Thanks for your help!