2 rows of black squares

adey2003 · Post by **adey2003** » Thu Oct 13, 2016 4:55 pm

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?

Post by **William** » Thu Oct 13, 2016 5:35 pm

Did it work fine before?

adey2003 · Post by **adey2003** » Thu Oct 13, 2016 6:44 pm

Yes for about a week

adey2003 · Post by **adey2003** » Fri Oct 14, 2016 7:05 am

Yes for a week or so, its a prusa i3 with gt2560 board , and lcd2004

adey2003 · Post by **adey2003** » Fri Oct 14, 2016 3:09 pm

Yes for a week or so

Post by **William** » Sat Oct 15, 2016 10:23 am

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.

adey2003 · Post by **adey2003** » Sat Oct 15, 2016 5:58 pm

The lcd seems fine, i cannot connect via usb to it all commands time out. Says, no start signal detected - forcing start

adey2003 · Post by **adey2003** » Mon Oct 17, 2016 4:54 am

On rechecking its not working , like an intermitant fault

Post by **William** » Mon Oct 17, 2016 2:33 pm

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.

adey2003 · Post by **adey2003** » Mon Oct 17, 2016 2:39 pm

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.

Geeetech

2 rows of black squares

2 rows of black squares

Re: 2 rows of black squares

Re: 2 rows of black squares

Re: 2 rows of black squares

Re: 2 rows of black squares

Re: 2 rows of black squares

Re: 2 rows of black squares

Re: 2 rows of black squares

Re: 2 rows of black squares

Re: 2 rows of black squares