CPS3 motherboard's problem

[sheep_nova]

One of my friend's pcb doesn't work.Any one who know how to fix it^+^?

Thx

 

[nem]

Check the pins on the PPU:

Post in thread 'CPS3 Bad Sprite RAM (24000000)'

Jan 2, 2024

Before trying to replace the sprite RAM chip, I forgot to mention it's extremely common for the pins of the GPU/VDP (that big ass QFP304 chip) to come loose. Check that first, especially the pins in the corner closest to the sprite RAM.

• Ape Cosplay

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Post in thread 'CPS3 Bad Sprite RAM (24000000)'

Jan 11, 2024

Still need to thoroughly test the board before shipping it back, but it seems that the culprit was two legs bent together and touching on a corner of the PPU.

Note that it’s normal for SIMM 1 & 2 to report NG when using the Darksoft BIOS and CD image. The game code is stored on those SIMMs and the code is modified to run without the factory encryption, changing the checksums that the diagnostics expect.

• ShootTheCore

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