Hello guys! Here I come again with another streak of bad luck... So...I've just got a new SC20H...plugged it regularly from the 8-ohm speaker output to an 8-ohm speaker cab by using a high-grade speaker cable. The thing does not make a sound! I put preamp at the half and then slowly started raising the volume. No sound was coming out of the amp until I really struck the chords very strong and then some weird distorted buzzy sounds of loud volume start to come out...no normal tones. The same is if I do the low input or high input, except when it is on high input this bad sound is much more distorted (again), and on the low input is more towards the cleanish sound. What is really crazy about it, I noticed that when I go to switch the amp off on the power button, by not transitioning from standby but going straight off from say high mode... then those chords that I've just played are heard and start to sound normal - this happens only when I hold the power switch in between ON and OFF...kinda stuck in the middle. I noticed this because the sound started to appear normal for the blitz of a second when I was shutting the amp down. And when it got shut down on the off switch it still rang a bit of those chords but seemed to me it was a normal sound there. Now does any of you know what a hell is this and what this means? I've never encountered this problem before. Also if I might add, no weird smell, flames, or whatever occurred. Tubes seem to glow normally, amp powers up normally. I have an Origin 50 that normally works with this same cabinet and the same cable connection, just tested it after this. This is my 2nd faulty Marshall in the row and I honestly can't believe it...I am really desperate and afraid I am going to have to return this one as well.