So my TI-99/4A has been acting up lately. In some games, like BurgerTime or Parsec for example, the system will lock up. Sometimes it will just stay frozen, sometimes the console reboots, and sometimes random graphics corruptions and characters appear all over the screen. I should also mention that sometimes when powering on it will lag for a few seconds longer than normal before getting to the main screen, and there is no beep when that happens. Probably unlikely, but is it possible that the power board is failing?
Thanks in advance!
P.S. I've also found that pressing on the middle of the top at the back will cause the corrupted graphics as well.