HI, G.
.
Thanks for the reply. I already sent an e-mail to Midge at MTH, with a brief description of the problem just for the record the failure. Also I sent the serial number of the Z4000.
She is out of office and will be back on September 21. I hope MTH has those boards to sell. I intend to buy the two boards. I do not know which one is not working.
Anyway, I´ll keep you informed.
Regards
A.C.Sant Anna