I have an aead 200-le that welds and works great. Didn't idle up when I got it, so with the help of some members here I got new scr's and replaced them. Now it idles up but never back down. It now it blows the printed circuit board line between d54 & r58. Soldered in an inline fuse in place of the line between d54 & r58 and it blows the instant the unit idles up. I know I can buy a new one but I like fixing things. Any ideas? Thanks guys