Mappy RAM 6 error

Hammerheadx

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I got my Mappy project up and running and was playing some games, when suddenly the sound went to a high pitch squeal, then the game locked up. Now it only partly boots and stops at "Ram 6".

Any guesses what's happened? I'm not electronically savvy and don;t own a logic probe.
 
come buy the gauntlet project and I will swap your mappy for a working mappy at no charge....Just sayin...
 
Aargh! I finally got around to swapping out 3K and 3L. The original chips were socketed and looked brand new.

Now, the game no longer completes a self check, immediately boots up to this screen.

Swapped the old RAM back in, no change.

What did I do wrong?

IMG_4836[1].JPG
 
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