Hello,
This one has me stumped. DMD on my Demo man pin went out, no screen at all. Looked at pinwiki and pinball ninja for the common cause. Checked the 47K ohm resistors and R3 was showing .5 ohms, went to the electric store and bought a couple. Same resistor measured 47K ohms on my world cup soccer so this resistor is not in line with the capacitors so you can measure it in circuit. Soldered old one off and new one on. Old resistor measured 47ohms once I pulled it off. New one measured 47ohms before I soldered it on, but now on the board it measures .5 ohms - What could do this? Checked the other transistors, resistors and diode in circuit all measured good. The 62 voltage circuit is the one that is bad.
Thanks for your help!
Matt

Same resistor measures 47ohms on world cup soccer in circuit. Board from wcs works just fine in DM. Voltage on 62 volt circuit is almost nothing.

All of those tested good on the mutimeter, only thing I did not test was the capacitors.

Crazy, I did all this testing before I put it back in the game. A shorted component somewhere else would pull the new resistor value down like that?

It is toasty

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Quick update, got her fixed. Did not do the full HV repair for now. Will see how long this fix lasts. This game is in my house so it's not running 24-7. Replaced 2 of the 2N5551 transistors at Q2 and Q10. The ones I took out both measured as bad. Retested the resistor at R3 and that now measured at 47ohms. Put the board in and DMD lights up!