Glitched Graphics (Sega NAOMI 2)

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.