Most likely the TED chip is bad. The next to go is usually the CPU. Unfortunately these are hard to replace. In the past I have picked up cheap "as-is" or beat up plus/4's hoping to get a few working TED and CPU chips. Steve On Nov 26, 2011, at 9:49 AM, "danielkovacs" <danielkovacs@xxxxxxxxxxxxxx> wrote: > Hi Everyone; > > I have a Plus 4 that powers up to a black screen, does > anyone in this list have any idea what could cause that? I > will bring it with me to WOC if anyone could look at it. > > Also I am looking to pick up a 1084s monitor in good working > condition. If anyone has an Amiga 600 they are willing to > part with, I'd be interested. > > Dan >