Acer Aspire one - printing and projector problems

Bit of guidance please. I am completely new to Linux and have encountered two problems with my Aspire one. a) When printing to my HP Laserjet 1018 I can print a 'test page' successfully but documents don't print. b) I used the netbook last night for a PowerPoint presentation through a Optoma projector. I used the down arrow key on the keyboard to advance the slides. About every 3rd or 4th slide the image disappeared from the screen and then automatically rebooted about 5 seconds later. This projector has never done this before when using my Windows laptop with the same presentation. I would be grateful if any of you knowledgeable people out there can help? Please keep any answers simple and as non-technical as you can. Thanks. Nick