[rescue] SUN IPC PSU - still not working after recap

[Andrew Back]

On 06/06/2025 13:42, Jan Liška via rescue wrote:
> Hello,
> 
> I’ve started recapping my IPCs using locally sourced low-ESR capacitors. 
> However, both PSUs I’ve recapped so far exhibit the same issue:
> 
> They power on for a very brief moment (about 0.1 seconds), the 5V rail 
> voltage rises to 2–3V, and then the unit shuts down. I checked the units 
> for cold solder joints and significant corrosion damage on trails but 
> found none.

This doesn't help, but just to add that I've experienced the very same 
problem and come across others who have also. Hence would be interested 
to hear if anyone gets to the bottom of what appears to be a common 
failure mode. Sadly my SMPS fault finding skills are pretty minimal.

Andrew