Problem with HD44780

Guest · Post by **Guest** » December 20th, 2005, 2:08 pm

I only just got my screen... hooked it up to the paralel port, installed lcdsmartie 5.3 and port95nt...

BUT, the screen only shows black squares when i start lcdsmartie. The squares stay there until i restart the computer (even if I unload lcdsmartie)... anyone have any ideas on what im doing wrong?

It's a brand new rig by the way, 64bit 2.4ghz amd, asus a8n-sli mobo, 2gig ram, 7800gtx...

Im so stuck, any help appreciated
Thanks

Workshed · Post by **Workshed** » December 20th, 2005, 2:22 pm

Do you get the alternating on/off test lines when you start the LCD up?

_X7JAY7X_ · Post by **_X7JAY7X_** » December 20th, 2005, 2:30 pm

Check your wiring again. What schematic are you using?

You see the blocks only at power up until the LCD is initialized. The most common cause is the Enable, and RS.

J

Guest · Post by **Guest** » December 20th, 2005, 3:10 pm

kk, i'm no n00b to pc's... but i am with these screens (it's my first one! lol)

I bought the screen in a kit that already had the wiring with it...

http://www.watercoolingshop.com/catalog ... cts_id=393

So im affraid i dont know what the hell "Enable and RS" is/means and i have no idea what schematic i am using wither lol

Guest · Post by **Guest** » December 20th, 2005, 3:17 pm

by the way... the screen is completely blank until i open smartie.. then the squares appear and remain there until a system reboot.

Workshed · Post by **Workshed** » December 20th, 2005, 4:48 pm

Send it back its faulty...

Rafael_Brazil · Post by **Rafael_Brazil** » December 21st, 2005, 7:45 pm

Check if you are using the power supply ground... In my case, at the first time that I built one, I was using an external 5v power adapter... and just when I turn in PC power supply, that?s ok!!!

Mike-1 · Post by **Mike-1** » December 22nd, 2005, 9:32 pm

I have the same LCD from the same suplier, check the soldering on the pins carefully, on mine two of the pins were shorted out by a tiny piece of solder. I just used a craft knife to remove the excess solder and everything was fine. Also check which way you have connected the cable at the back of the LCD.