@harperlynn: That really blows monkey chunks that you have to have a mac. I hate macs (But not for steve jobs related issues, they’re just…. well, I won’t get into that.) so, I apologize for that. Macs aren’t fun.
Personally, I would tell Apple where to stick it. Don’t go back to them. Find somewhere else to go and call them up and let them know it’s a mac and exactly what the apple store told you. Do not go to best buy, GeekSquad will just screw you over for funzies. I’ve never met a more uneducated bunch of “Computer techs” before. Geeksquad is awful.
Hop on google and do some searches for localized computer repair. Look for mom & pop shops. Why? Those people, because they’re not large companies, have to be good at what they do. You might want to ask around your school if there are any computer repair fanatics.
“Virus damage” is purely on the hard drive. Viruses, as you know, are malicious code that are designed to target particular bits of information and obliterate it. 9 times out of 10 they only destroy information. They can damage the computer, for example, by changing bits of code to make your fan stop working and thus cause the computer to overheat and destroy itself. But no one can script a virus that turns around and says, “This virus is going to permenatly damage the hard drive/motherboard/power supply/etc” That’s just not how viruses work. It’d be like getting a cold and the cold making your arm fall off. Make sense?
I’d have to take a look at your computer to be sure, but I’m assuming that a reformat (Completely clearing off the HD) would help.
You said you can’t turn on the computer, like, at all? When you hit the power button nothing happens? My first reaction would not be “Virus” but first it would be “Battery” followed by “Power supply” followed by “Motherboard battery” followed by “Did the fan die [For unrelated reasons]? Did the whole unit get too hot and fry itself?” Frying itself doesn’t have to be related to a virus. Macs, at least Macbook Pros, turn into the temperature of the sun (I’m on a macbook right now tbh.) and they can literally toast themselves if the fan stops working or if proper cooling is not accounted for.
So, TL;DR: Apple is going to try to get you to buy a new mac. They’re going to tell you a whole lot of scary things in order to convince you to buy a new computer and/or pay for their repair services. That’s just how apple is. Best Buy’s GeekSquad will do the exact same thing with the potential of them ruining your computer because GeekSquad is inexperienced and they are not properly trained. Take it to a smaller, local shop. Read everything they give you and question them often.