From: cd@notformail.com   
      
   On Sun, 23 Oct 2022 04:54:49 -0700 (PDT), "Peter W."   
    wrote:   
      
   >It is already almost a certainty that the issue is in the power-supply. All   
   that rubber spoon will tell you is that the issue is in the power-supply. At   
   which point, you will need to troubleshoot at the component level.   
      
   Well, I'm inclined to agree it's most likely in the PSU itself.   
   However, if it comes down to troubleshooting at component level then   
   I'm stuffed - certainly if I have to do it powered-up, because access   
   is very poor indeed on this model. On previous Tek scopes I've worked   
   on, it's been possible to pull the board out and work on it live   
   without much difficulty, but the 'plumbing-in' as it were of the   
   wiring on this one without some dedicated extender board is going to   
   be very challenging indeed.   
      
   >Each time you apply power to what amounts to a dead-short, you may be   
   damaging other components downline. When the second fuse blows, *STOP THERE*.    
   Or the first, if there is any sort of associated symptoms such as heat, smoke,   
   noise or a vaporized fuse.   
      
   OK, I have! When a new fuse blew after I'd replaced the 2 RIFAs, I   
   posted here and haven't attempted another power-up since.   
   Apart from the RIFAs, there's no sign of physical damage at all to the   
   other components. :-/   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)