DMD problems

[nibsy]

I'm a relative noob when it comes to board and DMD problems, so can anyone tell me how I distinguish between the DMD becoming "gassed" or being in need of a HV rebuild/ problem with the DMD driver board?
My lw3 DMD takes a minute or so to warm up about 1/2 to 2/3 appears quite quickly and gradually more of the upper lines appear until it's fully working after a few minutes.
Thanks.

 

[nibsy]

Short clip of start up...
https://www.dropbox.com/s/b3mjqj9dfsg3ee4/VID_20180202_133314107~2.mp4?dl=0

 

[nibsy]

I found this, helps explain DMD problems and their operation...
...https://pinballrehab.com/1-articles...-test/244-repairing-wpc-dot-matrix-controller

 

[ronnie63]

It's usually a sign of the display outgassing but might be useful to check the needed voltages to power the display

 

[nibsy]

So I swapped the DMD from one of my Williams pins, it came on straight away no delay. I guess the lw3 DMD is becoming gassed then and this will only become worse and strain the power supply to it?

 

[pinballmania]

Correct.