so....the two closest to the rear of the unit?

IF I'm not mistaken, as I was looking in the chassis at the four transistors, I think I traced the circuit from the B channel to the two on the right. This is as I'm looking at them with the three legs pointing towards me.
If I traced the circuit correctly that is. I'm nowhere near the level of MJMP.

Yeah, if something else is FUBAR, maybe those transistors won't get fried. My question is; which two run channel B? I would only have to change two instead of four parts.

I guess that's another reason to change one part, and then check

Rather than start a new thread, I'm reviving this one.

Where to start...Focusrite + Windows = Headache.

It seems like the Focusrite constantly wants to disconnect itself from the desktop as far as the DAW is concerned. I don't know it it's Cubase, or Windows, or just the stupid Dell Desktop I have.

So, I'm looking into replacing ALL of it!

Starting with the PC. I've been looking at a Macbook Pro to start with. A bit pricey at $2500 USD, but I imagine it will be better for networking and maybe even the DAW. I may try the Focusrite in that before I commit to a Presonus. I'd like to salvage what I have before spending all that cash on completely rebuilding the entire set up.

Has anyone here with a Mac tried any of the Focusrite hardware, and if so, can you offer any suggestions/advice?

I'm just sick of trying to record tracks and it looks like I'm doing it, but the end result has no sound.

Now if we could only figure out the cause and fix it, that would be great!

Ok time to revise this old thread. I finally bought a USB <> MIDI connector, connected to a MP-2 and tried out the program.  While the back end work is great the interface is cludgy because of the rotary knobs and only one way to change them i.e. swipe up down with mouse while clicking left button.  So I started looking into how to change the UI.  The UI is in WPF (now deprecated) and the code is C# using .NET.  So far a friend has been able to change the knob widget to a slider but we haven't worked out the communication with C# yet, so you can't (it seems) just swap them.  I also want to add scroll wheel support and direct edit of the value(s) and pick lists or radio buttons for things like voice selection.   Also I want to move the program selection to top left corner (seems a more usable place for it) and get rid of the 2 screens showing the hex program values, while I'm sure they are interesting, they don't add value when programming a patch (that I can see) and take up quite a bit of screen real estate. 

I have a longer wish list like being able to do RTM assignments, but getting the UI easier to use while auditioning the patch is my immediate focus.  It would be good to leverage of all the DSP/VST stuff as some of those plug ins have really good UIs (e.g. the MP-1 plug in) but I suspect that would mean re-engineering the C# into C/C++.  But then maybe it can be cross platform. As Valdiorn said, he used the tools he had and was very familiar with.  Unfortunately, they are now quite dated/deprecated  (e.g. WPF) and .NET dependant. My friend helping with this said you need an older version of visual studio for the C# .NET stuff.

So we are working on it (in our/his spare time).

@valdiron, are you still around ?

As much as I hate to say this, it's a common problem with these amps. But, do not despair, it's an easy fix!

See this thread

Some cheap parts and some solder skills should put you back in the driver's seat (parts list below}

Dante,

I'm glad it worked out. I'm going to have to do that to mine as well and put those 10 split stack cabs to work!

I think it might get a little loud.      

Guess what? I got all the parts from Mouser, and as of today, my MT-100 is working fine! 

I know I'm supposed to change one part and test it, then change another, etc. but I just changed all four and tried it out. It works!!! Both channels!! YES!!!

I'll be rockin' it out for a couple days to put it to the test

That was an easy fix, and so fulfilling now that it's working in stereo again. I'm stoked