SA 410 Technic reveiver

[naelec]

Hi everybody
I have an old but very good SA 410 Technics receiver which was working well since last time I used it (few weeks ago)!!!!!!!

Now ,no output sound at all.....There is a short sequence when powered up : first preheat light comes ON and then green AUTO light comes ON ! I get this but I am sure I could hear the click of a relay after this but NOT now !!!!!!
Does somebody know this problem and the solution ,please?
Thanks in advance in have a good day
Michel