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Author Topic: Seemingly Broken LCD  (Read 616 times)
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I just bought this LCD,

http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=190637600054

and it seems to be broken. The backlight comes on, but then as soon as it recieves input it shut off. I can't seem to get it working no matter what I try. I have even tried their test code but it doesn't work. I am new to this and would be grateful to anyone who could point me in the right direction. If someone could come up with a compatable test code that would be appreciated as well.
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Central MN, USA
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Read this one (not all points are relevant to you)

http://arduino.cc/forum/index.php/topic,102266.0.html

Saving some money at purchase is probably the source of the problem. I don't have this exact LCD so hope others can step in with inputs.
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Their test code is written for a 16x2 display and you have a 20x4 display.  You should change this line:
Code:
LiquidCrystal_I2C lcd(0x27,16,2); //set the LCD address to 0x27 for a 16 chars and 2 line display

This discrepancy does not make any difference with the regular LiquidCrystal library so it may not have any effect with LiquidCrystal_I2C either, but it's worth a try.

Don

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Your display uses a 'Yw Robot LCM1602' serial backpack, which is a ripoff of the DF Robot serial backpack, which may very well be a ripoff of another device.  If you do a search for "ywrobot serial lcd" some solutions will be returned.

Don
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http://arduino.cc/forum/index.php/topic,102266.msg767183.html

Now S-5 has been updated to emphasize the fact you have to stick with seller's library. In your case, the seller is not providing a library, meaning, you stay the hell away from them next time. If I wanted another I2C backpack I probably buy from forum member fm's store.
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