[UK-CONTEST] Computer PSU Problem - Off topic

[Ian White G3SEK]

G3SJJ wrote:
>Any thoughts on this?
>
>Switch on Mains, nothing happens, no PSU fan. Plug fuse OK, 230v at other
>end of mains cable. No dc voltages from PSU. My thoughts are that the Power
>Supply is duff. I could get a replacement and install it but this is a
>neighbour's computer and I don't want to start taking it apart unless I am
>certain I can affect a proper repair.
>
>The only sign of life is a green LED on the mother board next to the DC
>input socket, which extinguishes when you remove mains plug.

It's no problem to look inside the PSU, if only to confirm that it isn't 
worth repairing.

My RadCom articles of a few months ago show where the major components 
are. (BTW, you may find that your 13.8V SMPS for the radio looks 
uncannily similar. My Astron 35A SMPS  is nothing else but a PC PSU with 
a few mods.)

Prime candidates would be the mains fuse inside the PSU itself, the 50Hz 
bridge rectifier and/or one of the two big caps. If it's anything more 
than that, it probably isn't worth repairing anyway.

Take care in there!


-- 
73 from Ian G3SEK         'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek