hello
the sony board mbx-223 the moment i turn on i see some aux supplies come on for 2 sec and off.the run_on signal does not generate.also I changed the micom same problem programmed the bios also same problem.But i noticed that if i disconnect the ram chip enbale PR146 the machine stays on forever but the supply of cpu does not come.
Is there a board issue with this model has a common problem on/off.
I believe sony follows some protection for control signals.and idea on this model
'thanks again