I completed the replacement of the crystal in this TI99/4A so the color stability should last years and years. I also re-did the thermal paste on the two IC chips. Cleaned every part.
Sadly the machine was missing one of its metal case covers. So I asked a professional auto body painter to give it a new metal look. The paint looks great and won't rub off like spray paint cans.
I added the BASIC manual, AC adapter and home made composite video cable.
This is a machine that will work and work for many years at that.
Thanks for looking!