kokiPsiho Posted November 4, 2006 Report Share Posted November 4, 2006 Hi, does anybody knows what might be problem with my 2x20 display. Picture belows shows the screen after power on. Cable is ok because it works on 2x40 display. Maybe the pining isn't same. I found somewhere that this may be LCD test screen. I don't know. Please help.thanx Quote Link to comment Share on other sites More sharing options...
TK. Posted November 4, 2006 Report Share Posted November 4, 2006 Hi,this is the typical screen of a non-initialized display. Maybe MIOS isn't uploaded yet?See also the bottom of thi spage: http://www.midibox.org/dokuwiki/doku.php?id=what_is_a_midiboxBest Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
kokiPsiho Posted November 4, 2006 Author Report Share Posted November 4, 2006 Hi,as I said core module and cable are ok because when I connect my 2x40 display it works fine. That's why it's strange. I think this happened once. Back then I was experimenting with connecting LCD directly to parallel port and programing in VB just for fun. LCD was stuck with these lines and it seemed like it was refreshed or reseted that way and it worked again. I'm not sure you will understand what I mean but I'm confused with all this. Also I read somewhere but I can't find it, which jumpers to solder to enable LCD backlight power form pins 15 and 16.thanx Quote Link to comment Share on other sites More sharing options...
kokiPsiho Posted November 4, 2006 Author Report Share Posted November 4, 2006 Hi,it looks to me that display is damaged. When I power on core module i get those lines. After a second, lines disappear for about half a second and are back again. This doesn't happen with 2x40 display on which after power on and first lines disappearing i get MIOS boot message. It must be my mistake with wiring, i didn't know it is that easy to destroy LCD. Thanks anyway. Quote Link to comment Share on other sites More sharing options...
TK. Posted November 4, 2006 Report Share Posted November 4, 2006 On some LCDs this can happen very quickly, others are more stable.I remember that I plugged J15 the wrong way on a noname device (from Conrad) some time ago - it destroyed the LCD immediately. Just one week ago the same happened again with another LCD, I already was swearing because of my silliness, but what a luck: the LCD still works!Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
audiocommander Posted November 5, 2006 Report Share Posted November 5, 2006 Will it work when you unplug the Midi Cables?And you haven't mentioned what application you're running. Regards,Michael Quote Link to comment Share on other sites More sharing options...
kokiPsiho Posted November 5, 2006 Author Report Share Posted November 5, 2006 Hi,i'm running MIDIbox TC. It works perfectly with another display. I found datasheet for it and wiring is OK. It's Picvue display www.picvue.com.tw. It seems damaged but I'm not sure. It's like display has stuck at that init screen because those lines disappear for a short moment and are back again. On another display after that I get MIOS boot screen as I already said. I will get new one and try because I have hole with that size already cut for my small MB64E. Quote Link to comment Share on other sites More sharing options...
HL-SDK Posted November 5, 2006 Report Share Posted November 5, 2006 Make sure your software is configured for the right LCD arrangement (20 instead of 40)That shouldn't have much to do with it :-/ Try another 2x20 Quote Link to comment Share on other sites More sharing options...
Jidis Posted November 6, 2006 Report Share Posted November 6, 2006 That is the 20 in the picture, isn't it? (16 wide ???)Hope you can get it working,George (once the destroyer of a 2x40) Quote Link to comment Share on other sites More sharing options...
matrigs Posted November 8, 2006 Report Share Posted November 8, 2006 hi !i just had exactly the same problem and wanted to post here - i checked all interconnections twice and still nothing.but then i came to the idea that i'm maybe giving the box not enough power and mios just won't start up. guess what? i change the voltage on my psu from 7,5 volts and it worked right away!so maybe you have the same problem - worth checking out i guess !! Quote Link to comment Share on other sites More sharing options...
toneburst Posted November 8, 2006 Report Share Posted November 8, 2006 I sympathise. I trashed my Crystalfontz red neg LCD by plugging the connector in to the Core module the wrong way round. It still occasionally works ok, but most of the time I get a glitchy mess of pixels, which sometimes flicker and fade out towards the left of the screen. I do remember it getting pretty hot when I first plugged it in, so I unplugged it as quickly as I could. It was OK for a while afterwards, but has been playing up since. It's really annoying, as I spend ages making sure I had the ribbon cable wired up correctly, then made the most stupid mistake imaginable by plugging it in the wrong way!Comforting to hear others have made similar mistakes though ;)I'll wire up another display soon. I have a blue one I picked up on eBay for about £6Alex Quote Link to comment Share on other sites More sharing options...
th0mas Posted November 8, 2006 Report Share Posted November 8, 2006 I sympathise. I trashed my Crystalfontz red neg LCD by plugging the connector in to the Core module the wrong way round. It still occasionally works ok, but most of the time I get a glitchy mess of pixels, which sometimes flicker and fade out towards the left of the screen. I do remember it getting pretty hot when I first plugged it in, so I unplugged it as quickly as I could. It was OK for a while afterwards, but has been playing up since. It's really annoying, as I spend ages making sure I had the ribbon cable wired up correctly, then made the most stupid mistake imaginable by plugging it in the wrong way!Don't feel bad, I plugged a SID chip in backwards *ducks* (and it didn't break ;) ). Quote Link to comment Share on other sites More sharing options...
matrigs Posted November 8, 2006 Report Share Posted November 8, 2006 i feel like a lcd-burning-virgin still :Doh i guess i'll rather shut my mouth because there is still much to burn before my box is made :> Quote Link to comment Share on other sites More sharing options...
julienvoirin Posted October 25, 2007 Report Share Posted October 25, 2007 I remember that I plugged J15 the wrong way on a noname device (from Conrad) some time ago - it destroyed the LCD immediately. Jif i plug the D0-D7 line in the other line of J15, will it destroy the display ? cause i did it (ona conrad equivalent display) and now i only have the black row of start ,and then a blank screen. :'( it was working before ... Quote Link to comment Share on other sites More sharing options...
doc Posted October 26, 2007 Report Share Posted October 26, 2007 Hi julien,I think you gave the answer to yourself ... :-\If it was working before ... and now not?Other users (like above) were reporting that the display was damaged after a wrong connection...so what do you want to hear ?Please double check your cabling to the display. There is a slight change that only a connection is broken or something else. But if everything is all right .... it died.Try another display on the same Core and if it works you'll know it definitly. :'(Sorry ... but shit happens 8)greetsDoc Quote Link to comment Share on other sites More sharing options...
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