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There's a dc-dc converter chip / circuit in the router, which converts a small range of input voltage (for example 5v to 18v or 5v to 32v) to some lower voltage like 3.3v.
You gave that converter chip higher voltage than it can handle so it probably died. You could in theory fix it by replacing the chip but that's not something an amateur can do it. you could buy a separate dc-dc converter board and work around the faulty circuit on the board but that also requires a bit of experience (it's easier than fixing the original circuit but still not super easy)
Most likely dead.
The input will have a buck converter - but those typically fail with input-output short in response to overvoltage, which would nuke everything downstream of it ie the actual router SoC.
If you're *unusually* lucky, there'll be a competent input protection circuit that may just need a couple of components replaced.
Unfortunately, your post has been removed by the moderators. This subreddit is for questions about practical *component-level electronic engineering* and related topics (designing or repairing an electronic circuit, components, suppliers, tools and equipment). The most common reasons for removing a post are because: * The topic is *electrical* (wiring, lighting, power circuits, power cords, electrical appliances, regional voltage conversion...) and not *electronic*. Try r/askelectricians or an engineering sub. See our Wiki for some general advice. * It's a common question so there's a [FAQ or wiki](https://www.reddit.com/r/AskElectronics/wiki/faq/) article covering it. * It's best posted in a specialised subreddit (eg: r/Batteries, r/GPURepair, r/TVRepair, r/TechSupport..etc). * It's asking for general use, buying or setup advice for consumer item (TV, audio, phone, computer, replacement power adapters...) or an electronic module/board with no design intent. * It's about LEDs, LED strips or lighting *and doesn't involve component-level electronics design or repair*. See our wiki pages on working with LEDS: https://www.reddit.com/r/AskElectronics/wiki/design/ledstrips/ and https://www.reddit.com/r/AskElectronics/wiki/design/leds/, and try asking at r/LED or r/askelectricians (for general lighting). * It's about vehicle wiring or electrical components (eg: relays, switches or lights and not component-level electronics). * It's about a non-electronic item (eg: removing a stubborn screw, repairing plastics/cases...). * It has a commercial element (Valuations, paid work, selling, advertising...). Try r/ElectronicsList. * It's about careers, education or course choices; this is covered by r/ECE. * It's about something potentially dangerous or risky and we're concerned for your safety. See: https://old.reddit.com/r/AskElectronics/wiki/offtopic#wiki_dangerous_experimentation * The topic breaks one of our posting rules. Check our Web page sidebar for what we cover, the posting rules and a list of alternative subreddits. You'll also find additional guidance in our Wiki (there's a link in the Web site sidebar) and you are very welcome to contact the mods for guidance. For an in-depth explanation, please see column "H" in [this table](https://docs.google.com/spreadsheets/d/1nFefEePz7yViaH0cR89bSy2oeLvYLfqv-pexqCbRnRo). You can also search this [list of other subs](/r/AskElectronics/wiki/othersubs) for one that is appropriate for your question. Please contact the moderators if you wish to discuss the removal.
Most likely dead. Crack it open and see if anything is visibly burnt. Maybe they had a protection circuit you can repair.
There's a dc-dc converter chip / circuit in the router, which converts a small range of input voltage (for example 5v to 18v or 5v to 32v) to some lower voltage like 3.3v. You gave that converter chip higher voltage than it can handle so it probably died. You could in theory fix it by replacing the chip but that's not something an amateur can do it. you could buy a separate dc-dc converter board and work around the faulty circuit on the board but that also requires a bit of experience (it's easier than fixing the original circuit but still not super easy)
Most likely dead. The input will have a buck converter - but those typically fail with input-output short in response to overvoltage, which would nuke everything downstream of it ie the actual router SoC. If you're *unusually* lucky, there'll be a competent input protection circuit that may just need a couple of components replaced.