Hisense Roku 50"TV. I purchased a hisense Roku 50" tv from Argos just over a year ago. It has proved to be the worst tv I have ever bought. The sound quality is poor, build quality flimsy. A few months ago I got an error message on screen saying the usb device needed more power( no usb device has ever been connected. I tried to dismiss the message , but it would not go away-covering the centre of the screen. Powering down the device didn't cure this so I contacted hisense by email ( the only way to contact them) to make a claim on the 2 year warranty. Took nearly 2 weeks for them to respond and that response would be to submit proof of purchase, which I no longer have. I registered and submitted all that information to Hisense when I registered the TV. Bearing in mind this error message has rendered the TV useless as it covers most of the screen, so I couldn't wait another 2 weeks for a response from Hisense so I took a look a the usb slot and discovered that there is no platic inside the slot so if a usb device was inserted, it wouldn't work due to a faulty port. I tried blowing the socket clear with an air cleaner aerosol, which didn't solve the issue and I eventually I got rid of the message by having to prise terminals within the socket. In the past 2 days I have had to retune the TV 3 times as it has lost the channels. The only way to retune this pile of **** is to do a full factory reset which means you have to.online to re-activate the TV with Roku. This is totally unacceptable for a £400+ TV. The manufacturer-Hisense - just seem not bothered. Hi sense products came highly recommended from an aerial installation company, but I regret the day I bought this 50" TV. I will never buy another Hisense and am now actively posting online online to avoid this manufacturer.