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Help with CPS2 A board please - boots to white stripes in every game

hatmoose

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Hello team CPS2

Another interesting repair job, this time Grey (Asia) CPS2 A board

I've traced the fault to the A board - B boards work perfectly with my other grey A board, and this board boots to the same white stripe pattern with every known good B board i try.

So my plan from here was to use the reverse engineered CPS2 A board docs to check traces, then probe for activity.

I successfully did this with a broken B board recently and found the damaged traces quite quickly
https://www.arcade-projects.com/thr...e-we-had-a-leaky-battery-repair-thread.19678/

But here I'm not really sure where to start. I dont think this is a graphics issue - it looks more fundimental than that - any pointers on where to start looking would be hugely appreciated
 
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