I have a Lionel/K-line 2-11556 CSX SD70 MAC,
When I placed it on the tracks today, (after boxed up for several years) > in command mode > addressed engine > it started smoking! 
And No! Not from the smoke unit, but from under the rear of the loco. Burnt electronics were in the air. Immediately pressed the 'Halt' button on the remote. Removed shell, flywheels spun freely and moved the wheels, with all wires still connected, I 'fired' it up again. Smoke billowed from the group of three triac's just above three white wire blocks! What Now? I'm assuming it's a motor control board. See Attached!
What are the possible causes?
Are there replacements available? [3304 - V (underscored) 94V-O & V-07, VER. 4.0, R32, MDK-090, REV.D]
Repairable?
Thank You!
