PoE no longer working

Please note that all other equipment is working fine (i.e. it's not a faulty connection / other hardware)

I recently upgraded my broadband from Fibre to G.fast and had the Huawei MT992 modem installed with the new master socket etc.

My TP-Link EAP225 V2 (https://www.tp-link.com/us/support/download/eap225/v2/) has now decided to stop working.
It's powered through the ethernet and no longer powers on and I don't believe I have the power cable to plug into the mains.

There are two options:
1) It's broken
2) The new internet set up is currently incompatible with the TP-Link (or needs adjusting).

I don't believe that it is broken as it was working just fine before I upgraded and have confirmed that its not a faulty connection or faulty ethernet cable.

I know next to nothing about how PoE works (other than the power comes through the ethernet port) so I don't even know how to go about resolving this.

What device is providing the PoE? Has the device that was providing the PoE been replaced as part of your changes? I am assuming that if you replaced the device the TP-Link was plugged in to that you replaced it with something that provides PoE as most consumer devices don't.

The only thing replaced was the master socket plate. Everything else is the same, with the addition of the MT992, G.Fast, modem.

Old configuration
Line -> Router -> Switch -> TP-Link - Working

New configuration
Line -> Modem -> Router -> Switch -> TP-Link - no power

I stupidly haven't tested the TP-Link in another environment (i.e. at a friend / office) to see if it would work here.

The Router is the FritzBox 7530 provided by Zen. I can't recall what the Switch is. I think it's Netgear, but I'm not home.

Edited by deleted (Fri 22-Nov-19 12:06:41)

Your link is for the TP-Link US site. Does the product you have look the same as shown in the picture, or is it like the one on the UK site?

That would suggest it is coincidence that it has failed at the same time unless a cable was knocked. Replacing the modem will make no difference as to whether the switch is able to provide power to the TP-Link, even if there was a config issue on the network the power would still boot the TP-Link it just wouldn't connect to the network.

If you can then do test the TP-Link elsewhere. Also, if you can borrow something else that is PoE powered you could test that. Try moving the TP-Link within reach of the switch and using a different, short, ethernet cable in case there is a problem with the cable. By a process of elimination you should be able to find the fault.

It's the same device.
EAT225 V2

Was providing the link to show what it was.

It's definitely not the cable. I use an ethernet to connect to my laptop in a different room to the original TP-Link area and when I use that same cable to plug into the TP-Link, there's no power.

I'm going to try and test it somewhere else over the weekend. It's possible that the TP-Link is broken.

I don't think I have another device that is PoE to test.

Does your PoE switch not have more than one port which you could try?

You might have a 12v PSU for another device that fits into the EAP225!

I tested it using another ethernet port that was working (as laptop connected to it) and it didn't power on.

I assume as 12v PSU = 12v Power Supply Unit.
Might do but will have to check. Can't think of a device I have with the same hole.

Does the switch not have an extra LED that lights when a port is supplying PoE? and if so it it lit when the TP-Link is connected?
It is quite common for a switch to only have some of the ports supported for PoE, so if that is the case make sure it is plugged into a PoE port.

Further many PoE switches are smart or managed and you can turn the PoE power off at the switch. It might be that a firmware update on the switch has put the port back to default which is not to provide and PoE power.

IMHO dumb PoE switches are just that dumb as power cycling a device requires mucking about unplugging and plugging ethernet cables.

A laptop doesn't usually require (or use) PoE and so doesn't test if the port is providing PoE it just tests if it is providing data.

As far as PSUs if you check the requirements for the device then there are many universal adapters that may well provide what is needed for testing.

Indeed, I use Ubiquiti switches and I can not only remotely switch the power on/ff to each port, I can see how much power is being drawn by each device. Very useful!

I found a plug that fits the TP-Link and there's still no power.

Maybe it is broken.

So weird.

There is one LED which comes on when there's power going to it.
But there's nothing when plugged into Ethernet, the mains or both.

I'm starting to think that it is broken

How long have you had it and how long was the warranty?

Couple of years.
It had Lifetime warranty but TP-Link has refused to provide a new one because I don't have any proof of purchase. I don't have the invoice / payment receipt or anything like that.
The item was provided by a bloke who did the electrics in the house. We didn't keep the invoice (why would we?) and he has since passed away.
He was a sole trader so ... don't think I can get a copy of the invoice.

Oh well.