(Topic ID: 288299)

Royal Rumble grumbles. DMD issue

By Gingerbloke

2 years ago

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975D7DCD-0D0A-498E-92F3-EB5BE3AE9C86 (resized).JPG

#1 2 years ago

Hi Guys - newly verified member -thanks RGAires been a member for years..

I recently got a data east royal rumble, when it arrived it had display issues - garbled display from power up. I played with the ribbons and 5v to the display board and it went away - don’t actually know what worked but I think it was a power connection issue.

Fast forward and I had to replace the Power board - old one was badly repaired at the GI connector.
I swapped the new one and - garbled display, it shows random sections of the screen and dots etc. the random bits are correct..
See the image..

So far I have:
Reseated and then swapped the ribbons
Checked the power to the graphics board - strong 5v
Tried a different 5v source to the graphics board
Re-soldered the v pins at the graphics board
Run a different power line to the graphics board
Checked the volts to the DMD - all ok. 5v,12v,110v,100v, 70v

Nothing has made any difference.
I am pretty sure this is a power issue - it worked perfectly yesterday and this morning right up to the power board change... but I can’t find the damned thing.

Anybody got any suggestions as to if another molex connector on the power board could cause this issue - or something else? Anything else?

Thanks a lot in advance


975D7DCD-0D0A-498E-92F3-EB5BE3AE9C86 (resized).JPG975D7DCD-0D0A-498E-92F3-EB5BE3AE9C86 (resized).JPG
#2 2 years ago

Reseated and then swapped the ribbons would be my first bet... Maybe other can help to find this issue.

2 weeks later
#3 2 years ago

Fixed.. Was a power board issue with 5v

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