Both (Upper and Lower controlers have 12Vdc coming in through the common supply.
The upper controler won't power on (no display).
Since the lower cabinet works fine, To test the two controlers, I swapped them over.
With the two controlers swapped, the result was the same (the lower cabinet still works and the upper controller still won't power up).
It makes me conclude that both controlers were working fine.
I found that the solid state relay (L1-T1) doesn't close. ( I bench tested it, applying control voltage accross (+) and (-) terminals.
Is there an external device (either input or output) that would make the controler not power on? When I depress the power button I hear a beep but no display coming on.
Please advise.
Thank you,
Frederick
