🚀 go-pugleaf

The first thing that we need to determine is which TRS-80 we are
talking about.

The Model 1 TRS-80 was a small piece of TRASH that offered a Z-80
computer with limited I/O - tape drive was most common, no inherent
sound capabilities, limited graphics 128x64 dots (or rather, blocks)
per screen, 64 characters across by 24? (25?) in normal text mode.[D
  I believe it came with 32K RAM, and automatic BASIC interpretation.
i.e. The Model I was a terrible attempt at a computer, but was
appreciated by schools because it was from Radio Shack, and could be
used to teach something about computers to students without choking
on the bill of buying a mainframe   (NEANDERTHAL computer)

There was a Model II computer that didn't last long, but I can't quite recall what it was, or the changes that made it Model II.

Model III was the HULKING giant that introduced disk drive options
IN unit, and a nice expensive upgrade available for HIRES graphics, although by todays standards, these should be called LORES.

I believe the Model IV was their only REAL contribution to the computer
world, and {we are still dealing with a HEFTY price tag, and a small
lack of consideration for miniaturization.

  Basically, I wouldn't repair it..I would try to offload it on a 
electronic hobbyist hard up for parts.,
[D
                         Rich

I learned BASIC on the TRS-80.