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 Post subject: lcd problem on k8400
PostPosted: Sun Dec 27, 2015 8:59 pm 
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Hi
I just finished my assembly k8400
the LCD screen only shows a blue screen.
The print head becomes hot and 2 red LED lights up, so I pulled the plug immediately.

I have examined all plug and I found no fault

can anyone help me.


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 Post subject: Re: lcd problem on k8400
PostPosted: Sun Dec 27, 2015 9:55 pm 
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Hi,
Check if the reset button on the LCD is not stuck.


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 Post subject: Re: lcd problem on k8400
PostPosted: Mon Dec 28, 2015 6:44 am 
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hi
there's only connection when I press the button


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 Post subject: Re: lcd problem on k8400
PostPosted: Mon Dec 28, 2015 8:46 am 
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What version of the firmware have you installed?


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 Post subject: Re: lcd problem on k8400
PostPosted: Mon Dec 28, 2015 10:53 am 
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raby wrote:
What version of the firmware have you installed?


Hi
I have never had any contact with the printer, only the blue LCD.
so it must be the firmware supplied with it


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 Post subject: Re: lcd problem on k8400
PostPosted: Mon Dec 28, 2015 1:54 pm 
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OK check if the 2 PCBs of the LCD are correctly connected together (it easily happens that the contact pins are not correctly inserted in the terminal). And also that the red stripe of the flat cable is on the left side (when observed from above with the front of the printer facing you).

NB : the reset button is in the small hole above the LCD slit and sometimes can stay pressed by the acrylic panel.

If you remove the LCD assembly, also check if you didn't partially rip off the rotary encoder when setting the knob in place.


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 Post subject: Re: lcd problem on k8400
PostPosted: Tue Dec 29, 2015 7:42 am 
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raby wrote:
OK check if the 2 PCBs of the LCD are correctly connected together (it easily happens that the contact pins are not correctly inserted in the terminal). And also that the red stripe of the flat cable is on the left side (when observed from above with the front of the printer facing you).

NB : the reset button is in the small hole above the LCD slit and sometimes can stay pressed by the acrylic panel.

If you remove the LCD assembly, also check if you didn't partially rip off the rotary encoder when setting the knob in place.



Thanks for all your responses.

Unfortunately, it all seems to be in order, so I should probably send it to
the manufacturer


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 Post subject: Re: lcd problem on k8400
PostPosted: Mon Jan 04, 2016 8:20 am 
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You can disconnect the main connector on the printhead to start troubleshooting.

Is it a newly build printer?


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 Post subject: Re: lcd problem on k8400
PostPosted: Tue Feb 09, 2016 11:44 am 
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Hello,

I have the same problem. My lcd is blue after the first startup.
I have 3 red leds on of x-y-z end.
A green led on the motherboard is on.

What is the procedure to check this mistake ?

Thank you for your help;

mecano3d


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 Post subject: Re: lcd problem on k8400
PostPosted: Tue Feb 09, 2016 3:13 pm 
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mecano3d wrote:
I have the same problem. My lcd is blue after the first startup.
Read this thread, you might find the solution


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 Post subject: Re: lcd problem on k8400
PostPosted: Tue Feb 09, 2016 3:19 pm 
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Check the voltage and Bad contacts between the two PCBs ?


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 Post subject: Re: lcd problem on k8400
PostPosted: Thu Feb 11, 2016 7:53 am 
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Everything is ok...

I verify all the cables, check the connectors of lcd...

Thanks


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 Post subject: Re: lcd problem on k8400
PostPosted: Tue Feb 14, 2017 12:00 pm 
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Location: MONA TILES COMPOUND, NR. CHHANI CIRCLE, CHHANI ROAD, VADODARA - 390002. GUJARAT, INDIA.
Firmware:

Cause: Firmware in motherboard is not working properly or wrong firmware.

Reinstalling Firmware

Process to reinstalling firmware. Check the Reinstalling firmware document.

After reinstalling firmware LCD screen still did not display properly or blank then motherboard is broken.

Motherboard:

Cause: The Motherboard is broken or malfunction.

Examine: Replace LCD screen and LCD cable of A printer with B printer in A printer. After replace, the LCD and Screen is not working in A printer then motherboard is malfunction firmware problem.

In other way, replace A printer LCD screen and LCD cable with B printer in B printer. After replace, the LCD work normal in B Printer then the motherboard is malfunction or firmware problem.
3d printing india


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