My Roku player 4800X suddenly stopped working. There were no changes in the setup: same t.v., same t.v. cabinet, same cables, same HDMI input, etc. - - it just quit working. I powered off for 10 minutes, powered back on, no change (I noticed that the Roku device seemed hot before powering off). It's hooked up to a LG t.v. model 49UF6490. I experimented connecting the Roku cable in a different HDMI port, no success. The message on the t.v. screen says, "No Signal. Please check the input connection." Is this problem repairable? Is the Roku player "worn out" and has to be replaced? Thanks