IBM PCjr

hardware / status: planning

An IBM PCjr from a garage sale, $5. It came with no power supply, no keyboard and no monitor, and the PCjr doesn’t share any of those with a regular PC. From what I’ve read so far it wasn’t a very good machine even when it was new, and sourcing power, a keyboard and a monitor for it looks like it’ll cost several times what the computer did. Right now I’m just figuring out what it needs before I spend anything on it.

Current state

As of 2026-09-11: Unpowered and untested. I have the unit and nothing that plugs into it. Reading up on what power supply, keyboard and monitor it takes and what each of those costs.

Had the lid off for a look. It’s clean inside. No burn smell, nothing black, and the caps I can see look fine.

The PCjr as it came. $5 at a garage sale, no supply, keyboard or monitor.
The PCjr as it came. $5 at a garage sale, no supply, keyboard or monitor.
Lid off. No burn smell, nothing black, and the caps I can see look fine.
Lid off. No burn smell, nothing black, and the caps I can see look fine.

Architecture

Nothing yet.

Hardware

Nothing yet.

Gateware and firmware

Nothing yet.

Decisions

Nothing yet.

Open problems

Nothing yet.

Build logs

Dated working notes for this project, newest first. Corrections land as new entries.

No logs yet.