THanks Troy,

I have confirmed those values - the Arduino actually has no real way to set anything besides 8N1 (unless one fiddles with various registers). I'm also using TTL logic of 0V low and 4.92V high.

I'll send you an email.

Thanks Raquel,

I tried both your suggestions, and neither helped.

The reset jumper didn't fix the issue and swapping the tx/rx lines resulted in the display displaying nothing (as I would expect).

Is there an RMA process?

I appear to have what I think is a defective LCD....I've got it hooked up to an Arduino, giving it regulated 5VDC and am sending at 19200 (with the RS232 jumpers unset and the TTL jumpers set), but all I get is noise when I send characters. I'm very confident the Arduino is working, as I wrote a tes...