I recently replaced an older HP Aero 13 with a Lenovo X1 Carbon. The Lenovo produced a powerful plastic- or solvent-like odor whenever it was running, and the smell remained noticeable even after years. It irritated my airways and caused headaches, especially in poorly ventilated rooms, so I mostly continued using the HP until it failed. I recently bought a Dell laptop, and it has a similar but much weaker smell that may be fading over time. I have owned many computers, consoles, handhelds, and work laptops, but only these two recent laptops—and a friend's Steam Deck—have had odors strong enough to bother me. Could this be off-gassing from plastics, adhesives, keyboard materials, thermal compounds, or something related to the battery? Has anything changed in recent laptop manufacturing, and is there a way to identify or avoid the source?
4 Answers
Glue and bonding materials are plausible sources. Modern laptops contain many laminated parts and components secured with adhesives, and some of those materials can continue curing or releasing odor when heated. Thermal compound is less likely to be the cause of a broad, persistent smell, but a battery or damaged component should not be ruled out without an inspection.
A mild new-electronics smell can be normal, similar to new-car odor, but it should generally fade. A strong smell that lasts for years or causes physical symptoms is not something to dismiss as simple sensitivity. Avoid sealing the laptop in a bag or enclosure to test it, and have the battery and internals checked rather than opening or continuing to heat it yourself.
If the odor becomes stronger while the laptop is operating, stop using it and have the manufacturer or a qualified repair shop inspect it. Possible causes include a failing battery, an electrical fault, or degradation of an internal coating. Even if the machine still works, a persistent chemical smell is worth treating as a safety issue rather than assuming it is normal.
Some adhesives, plastics, insulation, and other assembly materials can release volatile compounds, especially when warmed. That can resemble new plastic or solvent and may linger if the materials were used heavily or the device was stored without much ventilation. Airing it out in a safe, well-ventilated place may reduce the smell, but headaches or airway irritation are good reasons not to keep using it until the source is identified.
It smells more like new plastic or a mild solvent than dust burning. The Dell is tolerable and seems to be improving, but the Lenovo has remained unusually persistent even when it is not running.
The Lenovo also has a faint odor when it is switched off, although it is much stronger when running. The warranty has expired, but I may still have it inspected before considering giving it to someone else.