I use a 24" LG TV as my monitor. Only 720P but I don't do CAD or anything else that requires a higher resolution. I got it mainly because it had a power brick. The power brick just down converted 120 VAC to 19 VDC. I got a 19 VDC car charger for a laptop and spliced the TV end onto it. My TV now only has one conversion, 12 VDC to 19 VDC instead of the double conversion of 12 VDC to 120 VAC to 19 VDC. Every time there is a conversion of electricity, losses are involved. A good inverter is about 80-85% efficient. On top of it all, it is a smart TV so I don't have to run my USB powered PC.