Dell Latitude 7400 Laptop

I received my "refurbished" Dell Latitude 7400 on Saturday and spent Sunday transfering files, downloading software, and setting up the device to be used for a small business. The first thing that stuck out while using was the fact that with my standard typing pattern, letters were missing in my words on the screen. The keyboard has numerous problematic keys, requiring a solid, direct push to make them work. The battery is defective, as, just as the description through Amazon states, it will only charge to 80%. That would be great if it worked as a standard, non-modified battery. Unfortunately, upon unplugging the unit and using it directly off the battery, the laptop shut off after about 45 minutes from having no power. Those problems would be bad enough, but now, after less than 3 days of use, the unit won't power on at all. Thanks for the hassle Amazon. -- A touch of an update. After contacting the seller, the have offered to send me a new computer, but also showed me a trick on how to get the current one back up and running. However, if the issue persists, it's going to need to be replaced regardless. Unfortunately, after taking 2 days getting this one set up, the hassle is huge. This issues with this one could have been tested prior to sale, which is becoming an unfortunate waste of time. Due to the courteous nature of the seller's customer support, I'm bumping things up a star, but if this needs replaced, that may change. Another update: I have altered this review again, as the laptop is not functional anymore. The include software was glitchy, the power source had constant issues, and the screen would de-pixelate constantly. It was functional but annoying for about 6 months. After that, it was useless.