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The TP-LINK Archer C7 is a wireless router with support for using both the 2.4 GHz and 5 GHz bands. It was announced on June 11, 2013.

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Router does not turn on.

I have the C7 router. During a thunderstorm, the router just stopped. There are no lights.

I tried the power adapter on other routers that I have and it turns them on, so the issue is not in the power adapter.

Is there anyway to fix C7 which does not turn on? Thanks for your help in advance.

Ответ на этот вопрос У меня та же проблема

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Hi @surajps,

There may have been a power surge during the storm that damaged the router’s input power circuit on the motherboard.

You will need to open the router and check for any damage to the components.

Here’s the TP-Link Archer C7 Teardown guide which should help to gain access to the motherboard.

If you see any damage or are not quite sure, post some close up images of both sides of the motherboard, especially near where the power adapter plugs into, back here. Here’s how to do this. Adding images to an existing question.

If you get it working again it is advisable to connect it and any other household electronic and electrical equipment via a surge protector -example only to the mains power supply. At least it will be the only thing that may be damaged due to power surges etc. and not anything connected through it.

iFixit Изображение

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Adding images to an existing question

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Очень просто

2 - 5 minutes

TP-Link Archer C7 Изображение

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TP-Link Archer C7 Teardown

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15 - 20 minutes

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I've replied below, maybe you can help me? I don't know anything about this

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I have about the same problem, the router is dead after a fuse was blown, I don't know how that works, but anyways, here are some pictures of the motherboard

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Update (09/21/23)

Hi @jayeff , thx for the answer, So the fuse was for another room in the building, so in theory should have nothing to do with the router failure.

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I don't have a DMM so I don't know if it's even fixable without propper tools

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Hi @swinglify

Which fuse blew, in the router, router's power adapter or the house mains supply?

Do you have a DMM (digital multimeter) and know how to use it?

Can't see it too well on the images you posted but could you post another image showing the designation of the two points shown by the red arrowhead in the image below?

If you have a DMM, connect power to the router and check if there is 3V DC on the test point (TP_3v3) shown by the blue arrowhead

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Hi @swinglify,

Without a DMM it will be hard to find.

Given that the fuse that blew supplied power to another room and not the one where the router was located, if it blew due to a problem in that room is one thing but if it blew due to a power surge for instance then perhaps the surge may have affected the power to the router room as well in as much in that it may have affected the power adapter that is connected to the router and not the router itself.

Check the output voltage specifications of the power adapter which should be printed on the adapter's case.

Also sometimes the voltage type and value may be embossed on the case next to the power port on the router as well.

If the adapter is an AC/DC adapter (converts input AC from power outlet to DC supply for the router) then since you haven't got a DMM to check if the router adapter's voltage output is OK then check if you have a compatible adapter that may be being used for another device or even spare lying around and plug that into the router and check if it works.

Ensure that it has the same type of plug so that it connects properly to the router.

Important! - Also make sure that the voltage output polarity is correct at the plug by looking at the polarity symbol that should be marked on both the original adapter and also any compatible replacement that you may use. If you use one that is reverse polarity to what is required then you will damage the router if it hasn't already been damaged. Usually however most devices are centre +ve 9V DC or 12V DC but it depends on the device as to exactly what voltage polarity and value it is.

If the adapter is an AC adapter that converts the wall power outlet from the usual mains voltage (either 120V AC or 240VAC depending on where you are) to a lower value AC voltage e,g. 120V AC(or 240V AC) down to say 15V AC then still see if you can find a compatible replacement as normally adapters have some kind of protection components e.g. fuse, surge suppressor (MOV etc) in built and they may have been blown.

Worth trying anyway.

On the new images you posted (thanks for that) there is a component marked FB1. This is a ferrite bead and it is used to smooth out any AC ripple that may be being superimposed on the DC supplied by the AC/DC power adapter if this is what it connected to supply power.

If it has blown (and you won't know without testing it using a DMM), then this may be why the router doesn't work IF the adapter is OK i.e. router still doesn't work when using a known working compatible replacement power adapter

Cheers

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