Hello all, I have an old Peavey TNT 160 (scoropion equipped). The problem is that when you plug in and power up, there is no sound. If I turn the pre- and post-gain up to about 4 or 5 there is a quiet, static-y signal. If i then turn up to between 5 and 6 and play a heavey note it will turn on and work fine (even if the gain is turned back down). I pulled the amp out and inspected it, nothing looked wrong (but I'm not too savy with this stuff). I also cleaned everything with electrical contact cleaner, but that didn't do much. I am wanting to sell the amp and don't want to take it to a tech who will charge me as much as it is worth. Does anyone have any ideas as to what the problem may be? Also, what is the price range that I could seel this amp in if I get it working right (I have no idea how much it's worth)? Thanks for all the help. It is greatly appreciated!