PCEngine model: US TurboGrafx16
Power Supply: Both OEM NEC 10.5v DC and Genesis Model 1 PSU attempted
Video cable: Composite AV and SCART RGB attempted from AV mods and from the super sd system unit (including after disconnecting internal RGB amp/composite
SD card brand: Sandisk Extreme 128gb
Region modded?: No
SSDS3 revision 1, 2 or B?: Unopened, didn't know I was allowed to before posting. Purchased from StoneAgeGamer in late December
In Game Trigger Off
Any other details specific to your setup: XRGB Framemeister and/or Ikegami Broadcast RGB monitor. My typical setup involves an internal RGB amp mod outputting video from a custom port on the TG16 itself and a custom cable from the SDSYSTEM with L/R audio only, but I have tested all outputs except RF which I removed.
When powered on, the system image will scroll from the top to the bottom relatively slowly, but becomes rapid when a game (particularly a CD game image) is launched. HuCard images launched from the SYSYSTEM display the same, slow scrolling as happens on the menu occurs here. When the SDSYSTEM is attached and a physical HuCard is loaded, the scrolling occurs. When the SDSYSTEM is detatched, the system functions normally.
The Turbo recently underwent a cap replacement where all new caps were thoroughly checked for placement/errors.