wont move on 1996 Hyundai Accent

Just bought this thing knowing it had problems. When u put the tranny in gear Nothing happens and I mean NOTHING no grinding sounds no movement. I thought it might be a cloggged filter so I changed it to no avail the fluid was not burnt and there was only a small amount of very fine powder like material in the pan. The previous owner said the tranny was slipping a little then it just stop moving altogether. Mech prob or comp?

Asked by for the 1996 Hyundai Accent
If the engine starts and runs the engine is fine it sounds like the transmission has failed. I like Hyundias if well taken care of they can be very reliable but the 1.5 Accent is not very valuable I hope you got it very cheap.
Got it a trade for an old dirt bike. But what I really meant to ask but ran outta room was do you think the tranny is mech shot or could it be the tranny computer? Thanx