I've posted this thread on behalf of my bro'... He purchased a Panasonic TH37PE50 about 2 weeks ago. All was fine until very recently. While watching Freeview channels, the brightness/contrast appears to dim down after approx 5-10mins viewing. If he randomly presses any button on the remote control or removes and re-plugs the ariel lead, the original picture settings are restored. He's confirmed this is only apparent with Freeview, DVD viewing is unaffected. I've re-read the manual and searched these forums, but nothing has come up with an answer. Any ideas as to the cause before we refer this to Panasonic? TIA. Gareth.