Broken CFAH4002A-TFH-JT?

[Mart]

Hi,

I am using an seeeduino mega and the liquidcrystal library to drive a LCD. I have the following output:

video:
http://step.polymtl.ca/~kmart/100_4063.MOV

Sometime it does print "ALLO" (even if the pic is not clear). If I swap a VFD (HD44780 compatible controller), it does print "ALLO" correctly without the blur.

Is my lcd toasted??

thanx

Mart

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[Mart]

any help or procedure to validate it is working or not?

 

[CF Tech]

First guess: It looks like it was disassembled and then re-assembled incorrectly--the zebras not making good contact.

Other possibility: Some kind of electrical damage (ESD, over voltage, reverse voltage).

Or it could be that there is something wrong with the initialization or the Vo (contrast) setting.

 

[Mart]

Hi,

thanx for the reply. The unit was not dissambled but can you tell me where are the "zebras" located?

First guess: It looks like it was disassembled and then re-assembled incorrectly--the zebras not making good contact.

Other possibility: Some kind of electrical damage (ESD, over voltage, reverse voltage).

Or it could be that there is something wrong with the initialization or the Vo (contrast) setting.

 

[cosmicvoid]

The zebras are strips of alternating plain rubber/conductive rubber, and they are under the metal shell, between the LCD glass and the PCB.