Author Topic: Wpc 89 board Display Corruption..  (Read 19728 times)

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Offline TUF-427

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Re: Wpc 89 board Display Corruption..
« on: February 12, 2014, 10:28:32 AM »
I'm also going with cables - they are 20 years old and this type of cable gets pretty flaky when unplugged/plugged a lot.

A new set isn't expensive - I would start there.

Agreed , First thing I tried was a full set of ribbons from a known working machine,also a display driver board,then a display,All to no avail !@#

So Swapped Mpu boards and Fault was transferred to new Machine, And Faulty one works fine with the other Machines Mpu..

So its Pointing towards THe Mpu....

So Far I have changed U 1-2-3 which are a pair of 74LS244 and 74LS245, and Reseated Processor chip and Asic and Game roms been swapped a few times..
Firepower, F14 Tomcat, Terminator2, Twilight Zone, No Fear, TAF, Hyperball, Sttng....