Just purchased the Grundig HD recorder and have a problem with the setting up connections to my system. When the HDMI lead from the unit is connected via my Sony AV amplifier to my Sony television I cannot get the picture back when bringing the Grundig unit out of standby. The only way to recover the picture is to switch the Grundig unit off at the mains and then back on again. I've tried a replacement unit from Comet but get the same problem. If the Grundig unit HDMI is connected directly to the HDMI input on the television I do not get this problem. Any ideas please.