Troubleshooting

So your good old TI does not feel good recently? Or you have bought a console or expansion on the Internet and wonder whether something is wrong, or whether you just don't use it correctly?

We will discuss some trobleshooting strategies on these pages.

Video issues

Sometimes you can find weird screen outputs on real TI consoles, some of them shown on Ebay. In most cases the problem is a defect RAM circuit. The video memory is implemented by 8 circuits of TMS4116 (16K x 1); that is, each circuit hold exactly one bit of each byte.