Visible crew/equipment: When Ash is driving away from the evil force, as he drives through the forest a huge set of spotlights is visible in a tree. (00:10:10)
Visible crew/equipment: When Ash crashes his car into the tree stump and is ejected through the windshield, you can see the wire attached to the dummy pulled through the windshield. (00:12:35)
Visible crew/equipment: When Linda's headless body is chasing Ash through the tool shed, at some points you can see the stick that's holding her muppet-like body. Also, at one point you can see the hand holding it up. (It is very visible after she gets the chainsaw in her neck and Ash is trying to beat her away. Easiest seen in slow motion.) (00:21:00)
Visible crew/equipment: When Evil Ed is floating in the air screaming "dead by dawn" you can see the black wire attached to his back. (00:42:55)
Visible crew/equipment: Shortly before Bobby Jo is attacked by the tree, a tripod, hastily covered by foliage, is visible behind her. (00:52:20)
Visible crew/equipment: When Evil Ash picks up Jake, to throw him, from a ground-shot you can see a black cable attached to Ash's back, and to the right side of the screen a crewmembers hand comes into view. (00:56:15)
Visible crew/equipment: When Annie pulls in the hillbilly guy after accidentally stabbing him with that ghoulish knife she pulls him into the cabin and you can see the knife bend like rubber against the door. (01:00:50)
Visible crew/equipment: When Henrietta is holding Annie up in the air you can see the shadow of the wire holding Henrietta on a ceiling rafter. (01:08:40)
Visible crew/equipment: When Ash and Annie hug, before the shelves crash down, you can see the head of a crewmember, crouched down behind the ledge, bobbing around. (01:11:05)
Visible crew/equipment: When Ash is being sucked into the vortex at the end of the film, as he flies through the forest you can see the harness and wire attached to him, making him fly. (01:15:15)
Answer: Sam Rami could not get the footage of Evil Dead to use in the sequel, so he remade the movie in a shortened form for the beginning. Since Linda was the only original character other than Ash to come back he included her in the recap but deleted the others as not to waste time. An in universe answer could be that trauma of losing his friends made Ash block them out and rewrite history in his head, except for Linda who comes back to haunt him in the movie so he is forced to deal with it.