I think the only option you have is to actually ring Sony, its dodgy opening the console yourself, especially if you dont know what you're doing. Their customer service number is: 08705998877 and they're really helpful. Im guessing if you dont have Playstation insurance and with an expired warranty you will have to pay for it. One of my PSN contacts has recently had to have his faulty bluray drive replaced and they charged £95 for it. You'll never know if you dont ring.
Im guessing nothing happens when you press the eject button on the console? Sorry if that doesnt help, when the problem is fixed I would always keep a bluray always in the machine to prevent it happening again....or you could always put your child up for adoption!! haha