How can I check my laptop for bed bugs?

Not seeing anything is reassuring, but it doesn't prove the inside is clear. There's no useful way to put a percentage on the risk from this information. Bed bugs can hide in small spaces, so the laptop's location makes it reasonable to check.

Use a flashlight to inspect the seams, ports, hinge and any gaps around the case. Check the laptop sleeve, charger and bag too. Avoid poking tools deep into ports or pulling keys off just to look.

Cleaning the outside with alcohol doesn't establish that anything hiding inside has been dealt with. I wouldn't pour or spray more into the keyboard or ports, since liquid can damage electronics.

If you're still worried, put the powered-off laptop and its accessories in a sealed bag while you ask a pest management professional about an electronics-safe inspection or treatment. Bagging contains any hitchhikers, but don't assume a few days in the bag will kill them.

Please don't put the laptop in an oven or try to heat it yourself. That risks damaging the battery and starting a fire. Insecticide strips or powders inside a bag are not a casual substitute either. Ask a pest professional what is appropriate and follow any product label rather than improvising around electronics.

If you spot a suspect insect, save it in a sealed container or take a clear close-up photo and ask a pest professional to identify it. That gives you something more useful to act on than guessing from an empty port.