PCB Repair: Mortal Kombat II
Problem
Severe graphical corruption. RAM UA11 and UA12 reported bad during self-test:
(There was also a sound issue but I’ll cover that another time).
PCB Repair: Rolling Thunder (again)
John here again with another Rolling Thunder but a different problem .
Problem
Sprites flicker and disappear in a ‘noisy’ manner. They don’t disappear in a ‘block’ manner, rather random pixels flicker as if the sprites are being blown away. Once warmed up, this seems to lessen, although one that sticks around the longest is a priority issue:
Not Phil