Thread: Prob with 4x20 lcd: blank screen...

I have followed the schematic except that (as per the above site's instruction) I replaced the 100 ohm pot with a 10 ohm resistor and got rid of the 10k pot (so pin 15 on the lcd aka VE goes to the 5V).

I Think there's the problem..
I have a 4x40 and it really needs the 10k pot
otherwise you won't have control over the contrast.
When I turn it to zero resistance, I won't see anything on the display, I have to set it all the way to 10k to see the characters on the display.

Put in a 10k pot and use it all the way,
should solve your problem.

Hope this helps you out.

Greetz

ergh...I put the 10k pot back in the mix...but I still get the same results..here's what the schematic looks like now..


Any ideas?

ARGH! I replaced the 10 ohm resistor with a 100 ohm pot so that I followed the schematic exactly...but it still doesn't work...when I turn the resistance down on that pot, the screen turns completely orange...so I know it's being powered...but it's still blank. When I turn the other knob, nothing at all happens. Help?