Nintendo DK Jr.

[John's Arcade]

What would cause one of these to start turning red after the game has been on for a couple hours?

I have a troubleshooting guide on my site (on the VS page) here:

http://www.johnsarcade.com/vs_downloads/monitors/sharp_troubleshooting.pdf.zip

It says what parts in the circuit control red. It's a lot of them.

[iankellogg]

I was thinking about this on my drive home. You probably need to do a cap kit and that might very well fix your problem. As the caps heat up their resistance is going to increase causing the biasing to change and causing the red to be over driven. I doubt its a transistor issue since those really dont change much with age.