Currently, iFixit does not offer a repair guide for the PS3 Slim YLOD, however, we do have guides for the [guide|3231|PS3 Slim Motherboard]. What I recommend is using the PS3 Slim guide to get to the motherboard, and then following the general procedure for repairing the YLOD from the PS3 fat [guide|3654|YLOD guide]. iFixit also offers a [product|IF213-028|YLOD fix kit], which includes everything you should need to access your motherboard.