Hi there. I have had a quick look at your site, will comment quickly now, but will fill the rest in the morning if thats ok.
All the site has too much white space, fill it out somewhat.
Logo and phone number - They both need to be a lot larger than they are.
The title bar, which is black with white lettering, the lettering seems to be a tad blurry. Not sure if its my eyes though. The colour scheme does not match with the rest of the page. The whole page, doesn't seem to flow for me.
What makes you so different from all the other techs in your area. Personally I don't see a Unique Selling Point anywhere, nothing really stands out. Think of something which makes you stand out from your competition. Mine is that we document all work we do for the client. This means the client develops a profile and has a bespoke service tailored to their needs. It may sound stupid, but it makes me different from the rest.
The logo size is larger than the main evening / weekend thing. Ie, it creeps into the other.
I have also had a quick look at your keywords. I am not a SEO prof by any means, but have you had a look at google keywords, to see exactly what is good for your business. Rather than simply putting in the areas you cover.