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The Challenge: Repairing Liquid Damaged TI-99/4A

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YARC - Yet Another Retro Channel

Let's try to repair a TI99/4A's with liquid damage. It appears to have had something nasty spilled into it, so who knows what kind of carnage has been wrought.

I'm going to apologize up front for some nasty technical problems with the recording. I hope you'll be patient. I hope to have all these issues fixed before I record again.

00:00 Intro
00:27 Looking at the TI99/4A
03:35 Cleaning with IPA
04:54 Cleaning with Baking Soda
07:10 After the First Wash
07:43 Cleaning the Back of the Board
09:38 After Washing
11:20 Treated with Vinegar and Rewashed
11:58 Retesting
13:41 Startup Sequence
15:54 Testing the Socketed Chips
21:27 Checking Voltage Rails
24:03 Checking for Clocks
26:07 Replacing the Clock Generator (TIM9904ANL)
33:23 Restoring the old TMS9904 and Retesting Clocks
35:09 Outro

posted by dreven2d