Old keyboards are one of the easiest retro peripherals to collect because they are useful, tactile, and often cheap. You do not need a museum budget. A dusty IBM Model M from an office liquidation, an Apple Extended Keyboard II from a flea market, or a no-name beige board from a thrift store can become a daily driver with a little patience. The trick is knowing what to clean, what to leave alone, and when a restoration project is worth your time.
Start by picking a keyboard you actually like typing on. Collecting is more fun when you use the gear. Buckling spring boards feel loud and firm. Alps switches can be smooth or scratchy depending on wear. Rubber dome boards are quieter and often not worth heavy restoration unless the layout is special or the memories are strong. Look for complete cases, intact cables, and all keycaps. Missing keycaps are the hardest part to replace, especially on odd layouts. If you find a rare board with missing caps, consider it a parts machine unless you enjoy long searches.
Before you clean anything, take photos. Every angle, every screw, every ribbon cable. Restoration goes wrong when a spring pops out and you cannot remember where it lived. Work on a towel or tray with a lip so tiny pieces do not roll away. Use a magnetic screwdriver only if you are sure the screws are not aluminum or plastic-coated. Most vintage keyboards use standard Phillips screws, but some use Torx or hex. A cheap precision driver set pays for itself.
Disassembly is usually simple. Remove the keycaps with a wire keycap puller or two bent paper clips. Do not use a screwdriver to pry them, because you will scratch the stems or crack thin ABS plastic. For buckling spring boards, the keycaps come off differently and the springs stay on the barrel plate, so do not yank them. Once the case is open, separate the top shell, bottom shell, and circuit board. If ribbon cables are attached, note how they fold and route.
Cleaning the plastic is the part that makes the biggest visual difference. Dust and grime come off with warm water, a drop of dish soap, and a soft toothbrush. Do not soak the whole case in hot water. Heat can warp ABS plastic and fade labels. For keycaps, soak them in warm soapy water for twenty minutes, then scrub with a toothbrush. Rinse well and let them air dry completely, preferably overnight. Do not put them in the dishwasher. The heat and harsh detergent can damage legends and dull the finish.
Yellowing is not dirt. It is a chemical change in the plastic, and it can be reversed with a process often called retrobrighting. The basic idea is hydrogen peroxide plus ultraviolet light. You can use a diluted liquid or a hair-care cream that contains peroxide, brush it on the plastic, cover it with clear plastic wrap, and leave it in bright sun for a few hours. Check every thirty minutes. Strong sun can cause streaks, so slow and even is better than fast and blotchy. Never apply peroxide to electronics, metal, or labels. If you are nervous, test on the inside of the case first.
The circuit board needs the gentlest touch. Dust it with a soft brush or a can of compressed air held upright. For sticky residue, use ninety percent isopropyl alcohol on a cotton swab. Do not pour alcohol over the board. If the keyboard has foam and foil pads, the foam may have turned to sticky crumbs. That is a bigger repair. You can replace foam with thin craft foam, but alignment matters. For a first project, choose a keyboard without foam.
When reassembly time comes, do not overtighten screws. Plastic threads strip easily. Test the keyboard before you put every screw back. If it uses a PS/2 or DIN connector, a simple active adapter can connect it to USB. If keys do not register, check the ribbon cable first. Most failures are a loose connection, not a dead board. If the cable is frayed, replace it or have it repaired rather than risking your computer.
Finally, store your collection away from direct sunlight and extreme heat. Use dust covers or simple cotton cloths. Rotate your keyboards so you actually use them. The best retro gear is not sealed in a box. It is cleaned, repaired, and clicking away under your fingers, reminding you why good input devices never really go out of style.
