The SNES used plastic, metal, and silicon to create a durable console that lasted decades

The Super Nintendo Entertainment System (SNES), released in 1990 in Japan and 1991 in North America, was built from three main material categories: the outer casing and buttons were molded plastic, the internal frame and shielding used metal, and the processing power came from silicon chips. Nintendo chose these materials specifically because they were affordable to manufacture at scale, could withstand years of controller button mashing, and kept the console cool enough to run reliably for hours at a time.

Understanding what went into the SNES matters if you're thinking about buying a used console today. The plastic degrades over time, the metal can corrode, and the silicon chips can fail — but knowing which parts fail first and why helps you spot a console that will actually work when you plug it in.

Key Takeaways

  • The SNES casing was made from ABS plastic, the same material used in car dashboards and Lego bricks, chosen because it resists cracking and discoloration better than cheaper plastics.
  • The motherboard and internal shielding used copper and aluminum to protect the silicon chips from electromagnetic interference and to dissipate heat away from the processor.
  • The cartridge connector pins were gold-plated to prevent corrosion, which is why dirty or corroded cartridges often don't work in older consoles.
  • The power supply was a separate external brick made of metal and plastic, and these fail more often than the console itself after 30+ years.

The plastic casing: why ABS held up better than you'd expect

Nintendo used ABS plastic (acrylonitrile butadiene styrene) for the SNES casing, the same material used in car dashboards, motorcycle helmets, and Lego bricks. ABS is more expensive than the polyethylene or polystyrene used in cheaper electronics, but it resists cracking when dropped, doesn't yellow as quickly under sunlight, and can handle the heat from a console running for eight hours straight without warping.

The downside is that ABS still degrades. If you buy a used SNES today, look for consoles stored indoors away from direct sunlight — the plastic on units left in attics or garages often turns yellow or brown, and the casing becomes brittle. A console that was kept in a dark closet will feel more solid in your hands than one that sat on a shelf for 30 years. The plastic doesn't affect whether the console works, but it tells you how the previous owner treated it.

The buttons on the controller and console were also ABS plastic, which is why original SNES controllers still feel responsive today if they weren't abused. Cheaper plastics would have become sticky or crumbly by now.

Metal shielding and the motherboard: keeping heat and interference out

Inside the SNES, Nintendo used aluminum and copper for the internal frame and electromagnetic shielding. The aluminum frame holds the motherboard in place and acts as a heat sink — it pulls warmth away from the processor and spreads it across a larger surface so the console doesn't overheat. The copper shielding wraps around sensitive circuits to block electromagnetic interference from the power supply or nearby electronics, which prevents the video signal from getting corrupted.

These metal parts rarely fail on their own, but they can corrode if the console was exposed to moisture or salt air (like in a beach house). Corrosion on the shielding doesn't usually stop the console from working, but it can cause video glitches or audio problems that come and go. If you're buying a used SNES, ask the seller whether it was stored in a humid environment or near the ocean.

The motherboard itself is made of fiberglass and copper traces — the copper is printed onto the fiberglass in thin lines that carry electrical signals. These traces don't wear out from normal use, but they can crack if the console was dropped or sat on, which is why a console that's been dropped is riskier to buy than one that's just old.

Silicon chips: the brain of the console and the hardest part to replace

The actual computing power came from silicon chips — the main processor, the graphics chip, the sound chip, and the RAM. These were soldered directly onto the motherboard, meaning they cannot be removed or replaced without specialized equipment. Silicon chips don't wear out from use the way mechanical parts do, but they can fail if they overheat, get exposed to static electricity during manufacturing, or straightforward reach the end of their lifespan after 30+ years.

The SNES had a 16-bit processor running at 3.58 megahertz, which was fast for 1990 but is now slower than a modern wristwatch. The graphics chip could display 256 colors on screen at once, chosen because it was a good balance between visual quality and manufacturing cost. None of these chips are made anymore, so if one fails, you either need to find a used motherboard or send the console to a specialist who can replace the chip — a repair that costs more than buying another used SNES.

You can't tell by looking at a console whether the chips are failing, but a console that won't turn on, shows a black screen, or freezes during games likely has a chip problem. A console that works fine when you test it in the store will probably keep working.

The cartridge connector: gold plating and why dirty games don't work

The slot where you insert game cartridges uses a gold-plated connector — the pins that touch the cartridge are coated in a thin layer of gold. Gold doesn't corrode the way copper or steel does, so the connection stays reliable even after hundreds of insertions. This is why the SNES cartridge slot still works on 30-year-old consoles, while the connectors on cheaper electronics from the same era often fail.

The cartridges themselves also have gold-plated contacts on the bottom. When you insert a cartridge, the two gold surfaces touch and create an electrical connection. If either surface gets dirty — dust, oxidation, or residue from storage — the connection breaks and the game won't load. This is why cleaning cartridge contacts with a cotton swab and isopropyl alcohol often fixes a game that won't play, even though the cartridge itself is fine.

If you're buying a used SNES, test it with a cartridge you know works. If it doesn't recognize the cartridge, try cleaning both the console connector and the cartridge contacts before assuming the console is broken.

The power supply: the part most likely to fail today

The SNES power supply was a separate external brick — a metal and plastic box that plugged into the wall and connected to the console with a cable. Inside the brick were a transformer, capacitors, and a rectifier circuit that converted wall power (110 or 220 volts depending on your country) into the 10 volts the console needed.

Capacitors are the weak point. They store electrical charge and degrade over time, especially if the power supply was used in a hot environment or plugged in constantly for years. After 30 years, the capacitors in many original SNES power supplies have failed, which means the brick no longer delivers power to the console. The console itself is usually fine — the power supply failed first.

If you buy a used SNES, the seller may not include the original power supply, or the original may not work. Third-party replacement power supplies are inexpensive and widely available, and they work just as well as the original. Before you assume a console is broken, try a different power supply if you have one available.

Why material choices mattered for durability

Nintendo's choice to use ABS plastic instead of cheaper materials, gold-plated connectors instead of bare copper, and aluminum shielding instead of nothing meant the SNES cost more to manufacture than competitors' consoles. But it also meant the SNES could survive 30 years of storage, occasional drops, and thousands of hours of play without falling apart.

Compare this to some consoles from the same era that used thin plastic, unplated connectors, and no shielding — many of those are unusable today because the plastic cracked, the connectors corroded, or the circuits picked up so much interference they stopped working. The SNES was built to last, and the materials prove it.

When you're shopping for a used SNES, the material condition tells you a lot. A console with yellowed plastic but solid metal shielding and clean connectors will probably work fine. A console with cracked plastic, corroded metal, or a broken power supply brick will need repair or replacement parts.

Frequently Asked Questions

Can I clean the inside of my SNES if it's dusty?

Yes, but carefully. Use compressed air to blow dust out of the vents and away from the motherboard. Do not use a vacuum, which can create static electricity. If you open the console, touch a metal part of the frame first to discharge any static before touching the chips or motherboard. If you're not comfortable opening electronics, a specialist can clean it for you.

Why do some SNES consoles turn yellow and others don't?

ABS plastic yellows when exposed to ultraviolet light from the sun or from certain types of fluorescent bulbs over many years. Consoles stored in dark closets or boxes stay gray or black. Yellowing is cosmetic and doesn't affect whether the console works, but it does indicate the console was exposed to light for a long time.

Is it safe to use a third-party power supply instead of the original?

Yes, as long as the third-party supply outputs 10 volts and has the correct connector. Many original SNES power supplies have failed after 30 years, and replacement supplies are designed to the same specifications. Check the voltage and connector type before you buy to make sure it matches your console.

What does it mean if my cartridges work sometimes but not always?

This usually means the connector pins are dirty on either the cartridge or the console. Clean both the cartridge contacts and the console connector with a dry cotton swab or a swab slightly dampened with isopropyl alcohol. Let them dry completely before trying again. If cleaning doesn't help, the connector itself may be corroded.

Can the silicon chips in an SNES be repaired if they fail?

Not easily. The chips are soldered directly to the motherboard, so replacing one requires specialized equipment and skill. If a chip fails, you can either buy a used motherboard and swap it in, send the console to a specialist for chip replacement (which is expensive), or buy another used SNES. Most people choose to buy another console.