dmd inop when starting up then outside edges start working when warmed up. is this a classic outgassed dmd symptom? I assume this is terminal? i should just swap with my other wpc game but if i can conclude it's terminal, that would be better. yep, i'm lazy.
at least this isn't a pinball investment thread, right? 
Post edited by davewth: clarify state of dmd function
Probably the HV section of the controller board. Pull a DMD from another game and see if it does the same or put this one in another game to see if it works. My guess is HV section of the DMD controller is toast and needs rebuilt.
thanks for the tip. i swapped dmd out and that's not the issue. HV section on my board looks toasty. I will pull it out and test it, see if i have more money than time and possibly get a replacement. I know, that's the lazy way of doing things.
Thanks for saving me the money for a new dmd i didn't need.
Here are your options in order of lower to higher cost and in order of harder to easier in terms of repair/replacement.
HV kit:
https://www.greatplainselectronics.com/proddetail.asp?prod=WPC-HVP-KIT
HV piggy back:
http://www.pinballlife.com/index.php?p=product&id=2828
DMD controller replacement:
http://bayareaamusements.com/Merchant2/merchant.mvc?Store_Code=BAA&Screen=PROD&Product_Code=PC-A-14039R
I think the piggy back is a lazy way to "fix" the problem. For $60 more you can buy a new board. Also, when the next guy comes over to buy the machine, you don't have to explain your aftermarket hack, just that you replaced the dot matrix controller board.
Plus, someone on here would probably buy your original for $30 or $40 because it's a very cheap fix for someone that knows how.
Quoted from davewtf:thanks for the help! i might do the piggy back as i am not very handy with a soldering iron.
I agree with jalpert, buy the new board and sell your old on here on Pinside. If you ever decide to sell your machine you have a good selling point with a new board not a negative point with a piggy back board. JMHO
This. He'll get your old board working for probably the cost of the piggy back, and he'll probably do it on site. Once the board is rebuilt, in a home environment, it'll go virtually forever.
Quoted from davewtf:Found someone to do the repair and am probably going to send it his way.
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