Caring for a Game Boy You Own

The notes below come from the bench — from inspecting, cleaning, and repairing these machines before they ship to collectors. None of it is about selling you anything. It is simply what we wish every owner knew, offered freely, so the Game Boy you have keeps working for another decade.

Missing lines on the screen

This is the Game Boy's defining problem. On the original DMG, the LCD connects to the board through a ribbon bonded with heat. Over decades that bond weakens, and the result is one or more missing vertical or horizontal lines across the screen — a row of pixels that simply does not display.

It is not a sign the screen is dead. It is a connection that has loosened. A common temporary trick is to gently warm the back of the screen (some people use a hair dryer on low) — the expansion can restore the line for a while, though it returns. The real fix is re-flowing the ribbon's bond, which is precise work and best left to an experienced technician. Worth knowing: this fault is specific to the original DMG. The later Game Boy Pocket and Light use an improved connection and rarely show it.

Battery-acid leakage — check this first

The DMG runs on four AA batteries, and old batteries left inside leak. The terminals corrode into a white, powdery deposit, contact is lost, and the symptom is simply "it won't turn on." This is one of the most common causes of a dead-seeming Game Boy — and one of the most fixable.

• Open the battery door and look at the terminals. White powder means alkaline leakage.
• Clean it gently with isopropyl alcohol on a cotton swab or soft brush, then let it dry fully before testing with fresh batteries.
• If the powder has spread onto the board, corrosion may have reached the copper traces — that is a repair, not a clean.

The single best habit for a Game Boy: if you are not using it for a while, take the batteries out. Almost every ruined battery compartment came from cells left in for years.

The polarizer, and the yellowing shell

In front of the LCD sits a thin polarizing film. With age it can turn purplish, cloud over, or show rainbow interference. This is the film, not the LCD itself — and replacing it brings the screen back to life. Distinguish it from a physical scratch on the panel, which is a different (and costlier) repair. As for the grey shell, it yellows under UV like most plastics of the era; keeping the unit out of sunlight slows it. Light yellowing is best treated as honest age rather than chased with risky whitening.

Speaker crackle and tired buttons

A scratchy "crackle" when you turn the volume wheel is the volume potentiometer's contacts gone dirty — working the wheel back and forth, ideally with a little electronics contact cleaner, usually clears it. Silence can be a loose speaker connector (an easy re-seat) or a worn speaker (a replacement). For buttons that no longer respond, the conductive rubber pad beneath has hardened; cleaning the pad and the board contacts with alcohol can help, but a pad that has lost its conductivity needs replacing.

Cartridge contacts and the save battery

A cartridge that boots to a white screen or is not recognised usually just has oxidised contacts. Clean the gold edge with isopropyl alcohol of 99% or higher on a fresh swab — gently, no abrasives, never sandpaper, and no spray contact cleaner that leaves residue. Separately, many cartridges (Pokémon, Zelda, and other games that save) keep their saves on a small coin battery soldered inside the cartridge, with a life of roughly ten years. When it dies, saves vanish. Replacement means opening the cartridge and soldering — a job for someone comfortable with it, not a first attempt.

With retro games, it is more often the cartridge's save battery — not the console — that finally stops the fun. The hardware is hardier than the save.

DMG, Pocket, Light — and the IPS question

• DMG-01 (1989): the original — four AA cells, a reflective non-lit screen with a contrast wheel, and the model most prone to the missing-lines fault.
• Game Boy Pocket (1996): smaller, two AAA cells, a clearer improved screen, and far less prone to missing lines.
• Game Boy Light (1998, Japan only): adds a built-in backlight for play in the dark — a Japan-exclusive prized by collectors.

There is also a modern choice many owners face: the IPS-screen mod, which swaps the original LCD for a bright, backlit modern panel. It looks superb and makes a 35-year-old display a joy to use. It also changes the object — the original greenish reflective screen is part of what a DMG is. There is no right answer: keep an original screen well-maintained if you value authenticity, or have a clean IPS mod done professionally if you value daily playability. Either way, the work should be done by someone who does it regularly.

Storage, and where to stop

• Remove the batteries whenever you store it for a while — the single most important rule.
• Keep it dry (30–50% humidity) and out of sunlight, at 15–25°C.
• Remove cartridges after use so the contacts do not sit and corrode.

Safe to do yourself: cleaning battery-terminal corrosion, cleaning cartridge and connector contacts with alcohol, re-checking battery orientation, working the volume wheel, and gently warming the screen to test a missing line.

Leave to a professional: re-flowing the LCD ribbon (the real fix for missing lines), replacing the LCD panel or polarizer, rubber-pad replacement, speaker or power-board repair, cartridge save-battery replacement, and IPS conversions. If "solder," "re-flow," or "trace" comes to mind, it is a professional's job.

A Game Boy was built to be carried through a child's whole world and survive it. Treat it kindly now, and it will likely outlast you — still glowing faintly green in the dark.