From: kjambrose@gmail.com   
      
   On Friday, May 13, 2022 at 4:52:29 AM UTC-7, phigan wrote:   
   > On 2022-05-08, Kenzo  wrote:    
   > > Thanks, I ordered a zoomfloppy today.   
   > I'm really liking this thread.    
   >    
   > Just wanted to chime in that I too have a C64 that powers on with just a    
   > black screen. I tried changing out the VIC and that made no difference.    
   > Even tested the original as well as relacement VICs in a known good    
   > system, and they both work fine. The first suggestion I got was to try    
   > replacing the PLA, which I did, and also made no difference (also tested    
   > that in the known good system). I don't _see_ any issues with any of the    
   > caps on the board, but that doesn't necessarily mean there aren't any.    
   >    
   > I'd be very interested to hear what's causing yours to do the same if    
   > you should find out :).    
   >    
   > Jelly of your C= collection! Never had a 128.   
   One book I have says a bad 6502 can also cause a black screen.  I guess the   
   moral of your story is you really have to troubleshoot electrically, just   
   replacing arbitrary chips is not guaranteed to solve the problem.  I have the   
   documentation and    
   equipment so I will be doing that soon and will update progress here.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)