@David-TP Hello David, I recently purchased 2 Deco P9 routers from Amazon Spain.

TP-Link Deco P9 (2-Pack) - PLC Wi-Fi Mesh Híbrido con Powerline, adecuado para Paredes Gruesas, Powerline AV1000 + WiFi AC1200, Cobertura de hasta 370 ㎡, 2xPuerto Gigabit, CPU Qualcomm : Amazon.es: Informática

Unfortunately, I received V1 routers that have the noisy bug (see attached photo).  In Amazon, there is no information regarding whether they are V1 or V2. There is a product description link for the routers: C1mo7JH8UpS.pdf (media-amazon.com). However, I do not see any information about V1 and V2. 

This is frustrating and I am going to send back the 2 Deco P9

  @David-TP 

Hello, I bought my v.1 deco p9 from the TP-LINK STORE on amazon on dec.2022.  Seems like now, TP-LINK off loaded all their defective P9 units to unsuspecting customers before taking them off their amazon store. 

Perhaps you are referring to 1 year as "quite a long time"?

Selling these defective units as new, knowing there is a hardware issue should be a crime.

I own 2x M4 version 2 and i also hear a buzzing noise especially when they're under high utilization.

@David-TP my guarantee has ended, any suggeston on what I can do?

  @theoapo 

1. google the fix for the deco p9.  its a "simple" take out the capacitor and put in a new one.  Should not be too expensive for someone who knows about soldering to do.

2. throw them in the garbage before they explode and burn your house down.

3. Start a class action law suit against tp-link for selling known defective products and having reps on forums deny the fact by saying the v1 models are not sold anymore

  @David-TP 

Well, I am 1000miles away from the USA now.  There is no tp-link anything in the country where I am now.  Sending those 3 units and cables back to Miami would have cost more that what I paid for them using fedex.  I could wait until summer 2024 to go back with them but that would mean I would have had 8 months of use of them out of a year and a half with the units.  Then after bringing them back,  i would have to wait how long for them to revise, fix, substitute or deny my claim?

Forget it.  

i opened them up and had some local guy change the capacitors as outlined by someone here.. even the one that wasnt buzzing.  Couldnt wait a year or buy another system.

Chances are this summer ill put them up on ebay when Im back in Miami.