Hi all, i have been offerd a Arcam AVR250 for £50.00, the seller said that the amp was working and that he changed some of the on screen settings and now the optical inputs don't seem to be working. At a guess i would of thought that this would be because he has changed a setting of some sorts. My question is, is there any common faults with the optical inputs stopping working and is there a setting to turn them on/off ect? Also, i currently have a Onkyo TX-SR308, although the Arcam is an older amp, would it be a step up or a step down from the Onkyo performance wise? Any help, comments would be great, thanks.