OK, I finally made it to the office! Our cable modem got smoked at home when they turned on the power with no neutral wire connected to the house (smh) and my hot spot setup is dismal. Here is what I will suggest -
Connect a source to your Sublime RCA input jacks. Ideally you would put a tone thru, like maybe a 100Hz sine wave. But a music signal with good bass will work too.
Make sure you have the knobs on the sublime turned up at least one third of the way so signal can pass thru. What you want to do is flip your sublime over and turn it on. Turn on your sound source. Then take your meter set to AC volts and test at the following points as pictured in the attachment (I have labeled them on the amp board with a black sharpie)
First measure at the RCA jacks (red led to center pin, black lead to ground tab) to determine the signal level coming into the amp. If you see no signal check your setup and your cables. If you are sure you have signal coming in thru the cables you can move on to the next step.
Next move the test leads to the amp board terminals labeled I + (red lead) and I - (black lead) Verify that you see some AC voltage. If you do not you know the problem is ahead of that point, that is, it's a problem with the preamp/control board or its connections.
If you do see signal voltage move your leads to O + (red lead) and O - (black lead). Again look for signal voltage. If you see none the issue is with the amp board or its connections.
If you do see signal at the amp output it's likely that the issue is at the binding posts as mentioned in previous posts.
Let us know how it goes and we'll see if you need to fix a connection or we need to send a replacement board out.
