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3 x Texas Instruments TI-99-4A Repair

Texas Instruments TI-99-4A Repair #1

Texas Instruments TI-99/4A Repair (1 of 3)

Defect:

  • Black Screen and deafening sound in background.

Replaced parts:

  • 1 x TMS9900NL CPU (U600)

Personal note that is good for all repairs:

Repairs are done with experience and skill, if there is skill does not mean that there is also the experience.

Repairing any electronic things by desoldering everything to find the bad components is not an index of experience but only ability.

Gallery of the repair:

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Texas Instruments TI-99-4A Repair #2

Texas Instruments TI-99/4A Repair (2 of 3)

Defect:

  • Garbage Screen.

Replaced parts:

  • 1 x TMS4116-15 RAM

Gallery of the repair:

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Texas Instruments TI-99-4A Repair #3

Texas Instruments TI-99/4A Repair (3 of 3)

Defect:

  • Man lacks his legs and miss a piece of rope in the pitfall game demo.

Replaced parts:

  • 1 x TMS9929TML VDC (Video Display Controller)

Gallery of the repair:

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