The site looks super spammy.
To improve your conversion rate you should have more information on your site. use a different payment provider (paypal is the choice of spammers. non-spammers too but mostly spammers) try shopify. add some analytics from mixpanel to see where people are dropping off. You should also increase the price of your product, i mean you are offering to fix my screwed up plasma tv, i've never seen that i would pay $30 for something like that. If you feel bad about charging that then throw in a wicked movie for people to watch after they fix there tv.