I just bought an RCA 52" R52WH74 and I'm having trouble saving settings in the service menu, specifically geometry. The default settings project the picture 2 inches off-center horizontally and 1 inch off-center vertically. I searched around on the net and found out how to enter the service menu (power-off the set, hold the [channel down] and [volume down] buttons simultaneously for about 8 seconds, the set will power-on in service mode). After centering, there's a little bit of stretching (amplitude) to be done and then everything is fine until I turn the television off. When I turn it back on, it reverts to default settings. The only option I can see to exit the service menu is 'Quit'. There's no 'Save Settings' or similar. This is driving me crazy. Any suggestions?