I have received from a friend a TI99/4A he got for a few bucks at a garage sale. The guy was not able to say if the machine was working but due to the really cheap price (10 Euros) he decided to pick it up anyway.
Unfortunately the machine will not boot up. The power light is on but I do see a black screen with a continuous beep sound. Sound pitch may vary on power recycle.
Is there first any tutorial on how to disassemble the TI99? I did repaired some C64 and VIC20 but this one is new for me. I tried to open the case but then leave it as a small PCB inside was attached apparently to both top and bottom cases so did not want to brake it of course. Before doing any stupid thing better to have a tutorial for this one :-)
Then concerning the fault where I should start to look at? I have some good experience in soldering/unsoldering + all tools needed.
The PSU has been tested working on another TI99 (my machine) so not at fault.
Edited by repetto74, Thu Sep 28, 2017 11:26 AM.