Unpleasant odor detected on the computer, potential risk involved, origin unclear
Unpleasant odor detected on the computer, potential risk involved, origin unclear
Occasionally last year my machine began emitting a strong odor that I couldn't identify. I took it to a repair facility, but they reported no scent detected. Although the intensity surprised me, possibly my confined workspace made it easier to notice alterations. Without further assistance, I suspected a possible damage to the motherboard. I had purchased replacement components in 2017, storing them in an old case from my first gaming PC—a Christmas gift from 2010. It's conceivable that incorrect wiring or age-related wear might have affected my newer board over time. I wasn't confident, being new to assembling computers, but thought it might be the root cause. Early this year, I faced a dilemma similar to the Ship of Theseus: gradually swapping parts until little remained of the original system. I changed RAM, power supply, and case, yet nothing alleviated the issue. Then I replaced the motherboard, which resolved the problem for about two months. Afterward, the odor reappeared. The smell is difficult to describe beyond its unpleasant, chemical-like nature. With the updated machine, it intensified—causing headaches, sore throats, and eye discomfort. I promptly sent it to two repair shops, neither offering insight into the odor. Once back, the PC would crash or shut down unexpectedly. Believing the issue stemmed from the motherboard I ordered from ASUS, they fixed the crashes but didn't explain the smell. Despite thorough checks—no debris in joints, no moisture, no smoking—I found nothing unusual. The SSD remains intact, and capacitors appear normal. I replaced the GPU to rule out that possibility, leaving only the SSD as the remaining suspect. I reformatted it to install a fresh operating system, but the odor persisted. I’ve tested the PC in various rooms to eliminate environmental factors, yet the smell is consistent. The house is old, and while electric interference is a consideration, it seems unlikely to be the sole cause within the past year. Another theory: the odor began coinciding with the installation of two new monitors. One uses a DVI-to-HDMI cable; it functions perfectly with my GPU but shows red pixels on the screen when connected directly to the motherboard. I’m unsure if this indicates a faulty cable or potential harm, but I’m open to any suggestion. What else might be overlooked?
It has a pungent machine oil odor, intensified by the warmth of the graphics cards.
Keep it running with the side panel off until you notice any smell, then shut down your PC and insert your nose inside. Check the power supply, near the GPU, around the motherboards, sniff the fans... also, are you using an extension cord with a surge protector? It might be that one is failing.
It’s possible electrolytic capacitors in the power supply are leaking electrolyte as they degrade, producing an unpleasant odor. Swapping out the power supply would clarify if that component is at fault. Oil from fan hubs might fall onto heatsinks or leak from thermal pads (between RAM and heatsink), accumulating on hot surfaces and possibly emitting a smell. This could indicate a problem; inspect for overheating plastic, look for cracks or dry insulation around wires near connectors—especially if they become brittle. Also examine the 24-pin connector: verify it’s fully seated, check the insulation condition, and test the AC cable and power supply socket. Turn off the PC and unplug it to assess plastic integrity; ensure no signs of burning or excessive dryness. If fan cables or other connections are touching pins or have sharp ends, they might short or overheat. Consider removing non-essential cables to isolate the issue. Verify the CPU cooler is properly attached and free from plastic barriers between the heatsink and CPU.
I rely on a surge protector but don’t use any extension cords. I’ve swapped out the power supply twice this year and searched for any signs of issues, but nothing stands out. I’ve inspected the wires and connectors everywhere, yet I still can’t pinpoint anything unusual. It’s difficult to describe since the odor seems to shift—sometimes sweet, other times unpleasant, and sometimes in between. No matter what it is, it’s affecting my throat and overall comfort.
I’m starting to think there might have been an animal nearby or something your pet touched or left close to the device. There shouldn’t be any sweet-smelling odors coming from your computer.
I see why you might feel confused. "Sweet" doesn't quite fit here. It doesn't have a sweet aroma. Earlier I mentioned a chemical odor instead. Since I don’t have a clear reference point, it’s tough to describe the scent accurately. But it seems the device is likely the source, because wherever I place it around the house, the smell appears only when it’s close and active. When I open and close the case, it feels like something is accumulating in my throat. This effect isn’t happening elsewhere. Honestly, it took me some time to realize the smell was coming from my computer. Before that, I thoroughly cleaned my entire home before confirming it. Also, there’s no way an animal could have reached the machine.
Did you apply any color or labels to your item? Others might also detect its scent. "A brain tumor in the temporal lobe can alter your sense of smell and produce a false odor."
I refuse any paints or stickers. Only me enters my computer room, and I’m usually by myself at home. If needed, someone can check it in a few hours. Please note the smell appears only when the computer is on or the case is open, suggesting something more than just a general odor—possibly a specific issue with the hardware.