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2 rows of black squares
Posted: Thu Oct 13, 2016 4:55 pm
by adey2003
Turned my 3d printer on today, display showed 2 rows of black squares, and usb wont connect just times out.
Any ideas how to fix?
Re: 2 rows of black squares
Posted: Thu Oct 13, 2016 5:35 pm
by William
Did it work fine before?
Re: 2 rows of black squares
Posted: Thu Oct 13, 2016 6:44 pm
by adey2003
Yes for about a week
Re: 2 rows of black squares
Posted: Fri Oct 14, 2016 7:05 am
by adey2003
Yes for a week or so, its a prusa i3 with gt2560 board , and lcd2004
Re: 2 rows of black squares
Posted: Fri Oct 14, 2016 3:09 pm
by adey2003
Yes for a week or so
Re: 2 rows of black squares
Posted: Sat Oct 15, 2016 10:23 am
by William
Maybe it's the Crystal Oscillator,you can check if it has a good soldering.
Then measure the voltage between the 2 pins(both sides of Crystal Oscillator)and GND separately.
Re: 2 rows of black squares
Posted: Sat Oct 15, 2016 5:58 pm
by adey2003
The lcd seems fine, i cannot connect via usb to it all commands time out. Says, no start signal detected - forcing start
Re: 2 rows of black squares
Posted: Mon Oct 17, 2016 4:54 am
by adey2003
On rechecking its not working , like an intermitant fault
Re: 2 rows of black squares
Posted: Mon Oct 17, 2016 2:33 pm
by William
Strange thing...
1.You said it appeared two rows of black squares,while the lcd seems fine after that.
Maybe you can show me the issue with a video.
2.Check if the LCD wiring has a good connection.
3.About the msg "no start signal detected",you can check if the baud rate is right and plug the usb cable to another USB port on computer.
Re: 2 rows of black squares
Posted: Mon Oct 17, 2016 2:39 pm
by adey2003
It just wont start up, checked all com port and baud settings, my friends spare board worked on it, and lcd displayed fine, he thinks the board is faulty.