preenfm Forum

PreenFM => preenfm2 and preenfm3 => Topic started by: ghostofjohntoad on November 24, 2017, 11:40:45 PM

Title: new build LCD lit but blank - (Solved)
Post by: ghostofjohntoad on November 24, 2017, 11:40:45 PM

Just finished building the PreenFM2 and it fired up 1st time.  I used an LCD instead of OLED. The LCD is lit, but blank.  I went back and checked all connections and then also put a 10k trimmer in for RV1 since I have the LCD(thought that could be the problem).  I checked the jumpers, I have jumpers on 1 and 2 but not 3.  I am using a compatible HD44780 LCD.  I am using USB power only.  The unit is making sounds and I can change them but I am doing so blind.  Any thoughts what else I can try?

Title: Re: new build LCD lit but blank
Post by: ghostofjohntoad on November 25, 2017, 01:18:20 AM

OK I solved it.  Didn't realize I needed a connection in the OLED resistor spot.  Put a wire there it it works great.  Awesome sounding!