Turbografx-16 freezes up

[jelloslug]

I have a Turbo that from dead cold will work just fine for about 5 minutes and the freeze up.  You can then power it off and back on and it will stay working for a shorter period of time.  Wash, rinse, repeat and eventually it won't do anything but show a white, yellow, or purple screen. A few times as it starts to freeze up the music has sped up to double speed or slowed down to half speed.  Any thoughts?

[thesteve]

sounds like the V-Sync may be dropping out on the 6260

[jelloslug]

Another thing that happened last night was that when it froze up the screen would duplicate itself into four scaled copies of itself.