NEC PC-8201a: Crumbling death foam – Can we save this poor slabtop?

Описание: Video sponsor: PCBWay: $5 for 2 layer PCBs with 24hr turnaround at https://www.pcbway.com/

I was not planning on making a video out of this PC-8201a that someone sent to me to repair but part of the way though I changed my mind. It was a good example of the benefits of taking a break when you’re heading down the wrong path and things are starting to look like they are getting complicated.

The initial problem of not booting had a simple cause, battery corrosion but finding it was a challenge. There were also corrosion problems with the LCD and a hard-fought battle with the LCD sealing foam of doom. Were we able to nurse this sick PC-8201a back to health? Join us and find out.

Timeline:
00:00 – Welcome
01:21 – Investigation and repair
09:54 – LCD woes
21:02 – Power supply recap
32:32 – LCD crumbling death foam
40:07 – Testing it out
42:12 – Wrap up, Thanks!

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Credits
Chiptune Thing No. 3 "Victory" by Steven O’Brien   / stevenobrien  
Creative Commons — Attribution 3.0 Unported— CC BY 3.0
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Music provided by Music for Creators    • Chiptune Thing No .3 Victory — Steven O’Brien