Glitched Graphics (Sega NAOMI 2)

1min

Glitched graphics such as flashing, checkerboard, random blocks or color distortion are all caused by:
Power-VR2 chips (IC15, IC110)
Their RAM (IC16-23, IC111 to IC118)
In rare cases, the video encoder chips (IC5, IC41)
In rare cases, the CLPD to video encoders (IC7)
Trace damage between any of the above chips
The most common by far are the RAM chips.
An example was IC111 RAM was faulty on one pin and caused a black and white checkerboard pattern over the whole screen.

Black Screen (Sega NAOMI 2)

AV Pinout (Sega Saturn)