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Problem with display on mate's T2

Graham Lowe

Registered
10 Years
Joined
Oct 16, 2013
Messages
139
Location
Skelton, Saltburn, North Yorkshire
So, long story but the basic problem is no display except for a brief flash of a number of random dots on switch off. Nothing otherwise. This started a while back with various lamps out on playfield, so having had similar issues on this machine caused by the ribbon cables I said to reseat them, at which point the whole machine went more or less dead. A new set of ribbon cables later and everything is good except for the display. Mate checked voltages from dmd driver which he reckoned were well off where they should be. Replaced the driver with a new one and still the same, as in no display. Today we swapped the DMD with my known working one just to eliminate it and as expected, no difference. All LEDs on all boards are doing what they should so we are now a bit at a loss of where to check next. Any suggestions greatly appreciated! Cheers, Graham
 
So, long story but the basic problem is no display except for a brief flash of a number of random dots on switch off. Nothing otherwise. This started a while back with various lamps out on playfield, so having had similar issues on this machine caused by the ribbon cables I said to reseat them, at which point the whole machine went more or less dead. A new set of ribbon cables later and everything is good except for the display. Mate checked voltages from dmd driver which he reckoned were well off where they should be. Replaced the driver with a new one and still the same, as in no display. Today we swapped the DMD with my known working one just to eliminate it and as expected, no difference. All LEDs on all boards are doing what they should so we are now a bit at a loss of where to check next. Any suggestions greatly appreciated! Cheers, Graham
To be a bit more accurate re voltages, we've just checked again with the original board installed and the only ones within spec are the 5 and 12V, others are more or less non-existent.
 
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