I was given 2 DSL's to repair the other day, they wanted one good one making from 2 broken ones and I could keep the leftovers. The first had a broken bottom screen and a loose hinge, the second had a damaged card slot so wouldn't read games. I swapped the motherboard from the first into the second and gave them it back fully working. I removed the card slot from the second and replaced it with a good slot, put together with a spare bottom screen I had, turned it on and it won't read games still, where's the damage likely to be? It's not the soldering on the card slot, that was a walk in the park compared to my usual soldering tasks!! Any help would be appriciated.