I bought a ds lite with 2 dull stripey screens. It was horizontal stripes though.
I was going to look at replacing both screens but I luckily found the vr1 and vr3 screws beside the volume switch. I gave them a little tweak while the ds was on and fixed both screens by playing with the voltage...
btw i feel this a good time to remind you guys that sea of thieves was made by rare, who also made DKC1-3 and DK64, alongside banjo kazooie and conker's bad fur day