hi new here need help

S20LEN · Post by **S20LEN** » July 26th, 2008, 8:15 pm

Ok so i got a HD44780 4x20 lcd screen and i got it to work with lcdsmartie.

But i have a problem i can see that the text is scrolling across the screen but there is extra characters on the screen so i can not read what it is suposed to say.

the extra characters ,,,,,,,,,,,,,,,,, all jumbled up all over the screen can someone help me please.

here is a video of the screen working but all jumbled
http://s234.photobucket.com/albums/ee14 ... screen.flv

Thank's

S20LEN

S20LEN · Post by **S20LEN** » July 27th, 2008, 9:09 pm

please someone help

Nachtwind · Post by **Nachtwind** » July 28th, 2008, 10:16 am

i'm not a specialist on this.. but the same thing happened to me after i was using a different software which didnt shut down correctly..
Try to clean reboot and run lcdsmartie.. and if already done.. maybe your LCD isnt attached properly and some data is misinterpreted?

S20LEN · Post by **S20LEN** » July 28th, 2008, 2:01 pm

hi i have tryed lcdstudio (the old version) and lcdsmartie and both programs do the same thing also i have checked the cables and rebooted every time and it still does this

Nachtwind · Post by **Nachtwind** » July 28th, 2008, 4:37 pm

then i would guess its a hardware error...

Post by **limbo** » July 28th, 2008, 8:28 pm

Lots of causes for this...

1.Wrong cabling (Most times)
2.Wrong driver (HD44780 is the correct)
2a.Hardware error (Rare) 2b.Burned LCD (I don't think so)
3.Incompatible LCD (Extremely rare)

My suggestion: check again cables and drivers.

S20LEN · Post by **S20LEN** » July 29th, 2008, 12:21 am

the cable that came with it only goes 1 way in to the lcd screen and has a printer port conector on the other side it is on ebay made by pcidea just plug it in and get software thats what it said unless the cable is faulty?

Post by **limbo** » July 29th, 2008, 10:13 pm

Please provide more info about seller and LCD cabling and connection.

I insist that there must be something on the cabling (maybe I'm wrong).
Until I have enough info to verify the correct cabling I can't be sure for an ebay seller.

Did he provided more info to you?
Did he suggested a program?
Can he answer, or give you a schematic diagram?

S20LEN · Post by **S20LEN** » July 30th, 2008, 6:17 pm

http://cgi.ebay.co.uk/HD44780-20x4-LCD- ... dZViewItem

here is the link to what i got from ebay

scroll down and you can see the cable

Post by **caesar** » July 31st, 2008, 6:03 pm

Please use LPT1,5 as display startup parameter instead of the simple LPT1 and report back.

S20LEN · Post by **S20LEN** » August 1st, 2008, 2:26 am

ok first it does not work under LPT1 i have to use $9c00 and it works i have tryed 5 but it make no difference i think it is a faulty cable

thx alot all

S20LEN · Post by **S20LEN** » August 4th, 2008, 9:38 am

i still need some help anyone?

Post by **caesar** » August 4th, 2008, 2:06 pm

It could also be that the cable is too long and the signals from you parallel port card are not strong enough.

If you can, test the LCD on another computer with integrated parallel port so that you will know if it's the LCD/cable or your card that has problems.