[A.N. Beal]

Dear Folks
My WD88XL works well, no problems when it is on. However when I switch it off there is a fairly loud hiss on the left channel, which then fades away over a few seconds. Swapping the valves between channels makes no difference - the hiss stays on the left channel. I therefore assume that it must be a dry joint somewhere in the left channel wiring. Can anyone suggest the most likely area that would cause this problem?
Regards,
Alasdair