update got myself the the stk power amplifier and with a bit soldering i now have a restored system. Thanks for members assistance.

thanks for that there is indeed one for sale on ebay ..regards..ken

looks like you may well be dead right with this one.anybody know of a supplier for the chip.regards ken.

hi thanks for the reply have done but the problem remains thanks..ken.

hi i have a beomaster 3000 had it form new 1985 ,now not working,when i press any of the touch buttons on the control panel the relay on the circuit board energises then drops out straight away . any ideas .thanks