TI-99/4A Troubleshooting and Repair

We repair the keyboard on a Texas Instruments TI-99/4A computer. #TI994A #retrocomputers #retrocomputing *********************************************************************** Texas Instruments TI-99/4A https://en.wikipedia.org/wiki/TI-99/4A Keelog TI-99/4A Power supply https://www.keelog.com/ti-99-4a-psu-m... Arcade Shopper TI-99/4A video cable https://www.arcadeshopper.com/wp/stor... MG Chemicals Carbon Conductive Pen https://www.mgchemicals.com/products/...