From: tomlake07@gmail.com   
      
   I have a Model 4 that will boot just fine into Model III mode (both Cassette   
   BASIC and TRSDOS 1.3) but when I try to boot into Model 4 mode, it looks like   
   the horizontal hold is messed up. After it's been on for a while (15 min or   
   more) it will boot    
   TRSDOS 6.02 OK and work perfectly as long as I don't turn it off and back on.   
   Can someone give me pointers as to what might be wrong? Also is there a   
   horizontal hold adjustment inside the computer? If so, which trim pot is it?   
   If all else fails, is there    
   someone here who can work on these old machines? I'm a software person and am   
   lost with anything but the most basic hardware fixes.   
      
   TIA   
   Tom Lake   
      
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