I bought a prebuilt gaming PC about two or three years ago and have used it on and off for gaming and schoolwork. It has accumulated some dust, although I have cleaned it with canned air a couple of times. Recently, I smelled burning rubber and noticed smoke coming from the computer, so I unplugged it and left it alone. Nothing looks obviously melted or burned, but I know that damage can be hidden. The system has an Intel i7-14700F, RTX 4060, 32GB of DDR5 memory, and a 1TB NVMe SSD. Should I inspect and replace parts myself, or is it safer to scrap the PC or have someone diagnose it?
4 Answers
The power supply is one of the most likely causes, but a damaged cable, connector, motherboard, or graphics card could also be responsible. Do not open the power supply itself—it can retain dangerous voltage even when unplugged. Check whether the system is still covered by the retailer or manufacturer, and otherwise consider having a technician inspect it. A replacement power supply could cost roughly $100–$200, depending on the required wattage and quality.
The RTX 4060 does not use the particularly notorious high-power connector associated with some much larger graphics cards, so that specific issue is unlikely here. Given the smoke and burning smell, the safest choices are professional diagnosis or replacing the questionable system rather than repeatedly powering it on. If you do work on it yourself, start with the case unplugged and never disassemble the power supply.
Check every power cable and connector, especially the cables from the power supply to the graphics card and motherboard. Even if you only used canned air, a connector could have been loose already or a cable could have developed a fault. Do not reuse any cable that is melted, browned, loose, or smells burnt. Also make sure any replacement power supply uses its own cables; modular PSU cables are not universally interchangeable.
The fact that nothing looks damaged does not prove the cables are safe. Heat damage can be inside a connector or power supply, so the source needs to be checked carefully before power is restored.
Do not keep testing it indoors. Unplug it, open the case, and look closely for discolored connectors, melted insulation, scorch marks, or a burnt smell around the power supply, graphics card, motherboard, and cable ends. If you do attempt a test, do it somewhere away from anything flammable with a suitable fire extinguisher nearby. A smoking computer is a serious warning sign, so replacing random parts or wiring without finding the source could damage more components.
I was worried that removing something like the graphics card might somehow cause another component to smoke. I understand now that it should stay unplugged until the suspected fault is identified.
It is unfortunately out of warranty, and I never bought the store protection plan. I may have to decide whether replacing the power supply is worth the risk and cost.