*** ELK M1KP Display issues. Dark LCD.

[Mp333]

ELK M1KP all pixels are lit making it hard to read. You are able to read from an angle. From time to time it does snap back to normal and then reverts. Any idea whats going on?
 
Thanks

 

[BraveSirRobbin]

Just some guesses.
 
Did anything change recently?  Power surge/outage, wiring change, power/battery change, firmware upgrades, changes to program, etc...
 
I would consider just taking it out and wire it directly into the main board via a short jumper (bypass any data bus hubs).
 
I imagine you checked the contrast setting?

 

[Mp333]

Thanks BraveSirRobin. I have everything you have suggested. The keypad is practically brand new with the new M1G. It was doing it even when i had the system on a test board to test it out. Also it is intermittent.
Also not sure if I should contact ELK directly? I believe they don't work with end users?

 

[BraveSirRobbin]

Hmmm, if you wired it directly to the board and are sure all the terminations are correct, I think a phone call from the vendor you placed the order with is warranted, especially since it is brand new.

 

[Mp333]

For termination i belive i have got one on each of the two keypads and the m1g panel. Not in front of the panel.

 

[BraveSirRobbin]

For termination i belive i have got one on each of the two keypads and the m1g panel. Not in front of the panel.

This would all depend on how those keypads are wired, i.e. serial or parallel to the panel.  Are you using any type of distribution hub?

 

[Mp333]

They are wired parallel. No hub.

 

[Del91574]

Each keypad would need a jumper then.

 

[jpmargis]

OP, check your data bus terminations.  From your description, it's hard to tell for sure, but I think you have three connected.  You need to have two - one at each physical end of the data bus.

 

[Mp333]

I have one on each keypad and one on the M1G-JP3. Its wired parallel with no hub.

 

[sda]

There should only be two terminators, one at each end of the bus.
 
If the M1G is in the middle, remove JP3.
(term)keypad---m1g---keypad(term)
 
If a keypad is in the middle, remove the terminator on the the middle keypad.
(term)keypad---keypad---m1g(term)
 
That might not solve your problem, but at least the bus will be correct.

 

[Mp333]

I have removed one from M1G-JP3. Only on one on each keypad which are in parallel. Will report back.
Thx

 

[Mp333]

Replaced the keypad and seems to be fine.