I am here to say, in the kindest, most sympathetic way, that you are completely screwed. Some service menus have a reset, or a factory reset option. You should never use this as it returns the settings to a null state, without settings; you are likely to have no picture at all if you use it. The television was originally calibrated with settings that were custom made for it. No other television, even one that is the same model will have the same ideal settings as yours.
Because of this, on this or any other board dealing with CRT screens, we always, always, always advise that you take a photo of all service menu settings, or at least write them down before doing anything with any one of them. You need to know exactly what every single setting is before you change any one of them, otherwise you may never get it back to its proper state of you take it too far.
Since your buddy, however well-meaning, did not do this, there really is no way back other than guess work, which is likely to make things even worse.