My RGB 20x4 LGB Appears Faulty

[Belial88]

The first 8 characters of the top 2 rows of my 20x4 RGB LCD from here has a different contrast than the other characters, and sometimes the characters are even a little buggy.

20x4 RGB Negative LCD HD44640 (from adafruit)
arduino micro

Low Contast


High Contrast


Connections seem fine (and I've been told this doesnt appear to be a connection issue). I can run LCD smartie just fine. The LCD worked just fine in debugging for the last few months and for a few weeks once actually installed. No excessive heat, no water.

Help :X

[adafruit_support_bill]

It looks like it could be a contact issue between the liquid crystal module and the display controller board. Does gentle pressure on the display bezel change anything?

[Belial88]

Pressing on the actual display itself? It has that liquidy affect of course but no, it doesnt change it.

[adafruit_support_bill]

If it is a contact problem, sometimes pressing on the metal frame around the display will improve things. If not, there is not much you can do.

[Belial88]

so can I get an RMA? I barely even got a chance to use the LCD ;/

[adafruit_support_bill]

These displays are warranted for 30 days.

[Belial88]

I didn't get 30 days of usage out of it. That's kinda sucky, how can I make sure this doesn't happen again?

[adafruit_support_bill]

In general, these displays tend to be pretty reliable. We sell thousands and have few reported problems. I've had a couple in service 24x7 for 3-4 years now.

If you contact [email protected] with a link to this thread, we can offer you a discount on a replacement.

[Belial88]

Okay my new one came in and it's not working. There's no contrast. I mess with the pot and those contrast boxes don't change, no characters show up.

;/

[Franklin97355]

Before you install it could you get some large, clear photos of both sides as you have it connected.

[Belial88]

Sorry that was my fault, it's working! Thanks for your help!