Few days ago thousands of users around the worldor began to notice a peculiar behavior in your devices Second-generation Chromecast and Chromecast Audio. The problem in particular was that from one moment to another simply your devices They could no longer stream content and above all, they stopped being available as devices available for streaming.
From Last Sunday (March 9), Thousands of second-generation Chromecast and Chromecast Audio devices began displaying an “untrusted device” message, leaving users unable to stream any content.
Personally, I, in your humble home (my home), have two televisions with a second-generation Chromecast and another with a first-generation one (the latter of which hasn't presented any problems so far). I hadn't noticed anything strange with these two devices, as they aren't used frequently, and it wasn't until today that I realized the problem.
An expired certificate, the reason for the problem
On the issue, a Reddit user revealed that Google issued a certificate for the 2015 Chromecast models which expired on March 9, 2025, coinciding exactly with the time when numerous users began experiencing problems.
About it, Thousands of users have expressed their concern, Chromecast devices up to the 3rd generation have become part of the famous graveyard of products and services, due to Google's preference for its Google TV and the gradual deprecation of the former. But in this case, it's not something Google planned, but rather due to the expiration of said certificate.
In response to this situation, Google has confirmed on the Google Nest Community forums that they are working on a solution. which will be implemented soon, and in the meantime recommends that users avoid resetting their devices to factory settings to avoid aggravating the situation.
Solutions and steps to follow
As we already mentioned, Google has stressed that devices should not be reset. to factory settings (sorry Google, I got ahead of myself...) and so far it has mentioned that the solution to the failure will come in the form of an automatic update, so there is no need to do anything, just have the device on and make sure it is connected to the network.
"Do not reset your device to factory settings; we will keep you informed when a solution is available. If you have already reset it to factory settings, we will provide instructions on how to set it up again as soon as possible."
I restarted my device, what can I do?
If you are one of the unlucky ones (like me) who without knowing about the problem simply opted to apply the most famous procedure (that is, restart), well let me tell you that this case was the worst thing we could have done, because this makes things difficult for Google, but not all is lost.
What you should do is that from your smartphone Before moving on to using the Home app to set up your Chromecast, it is change the date on your smartphone or the device with which you are going to configure the Chromecast to a date before March 9 of this year (2025), I changed it to March 8 (here you must deactivate the automatic date).
After that, without restarting or anything, you'll disable your mobile data and close all apps. Now You'll open the Home app and set up your Chromecast as a new device.Previously, your Chromecast wouldn't connect and you'd get the error "Chromecast can't connect," but now you should be able to connect it to the network and complete the setup process.
If for any reason, you still have the same problem, It is recommended that you try with another device, following the same steps and you may not be able to do it the first time.
Finally, if this solution has not worked for you, i recommend you that you do not despair and that in the first instance that stay tuned for future announcements that Google can give, you can do this from the link below.
Now if you are one of those who does not like to wait and wants to try to solve the problem on your own, I recommend that you try the following solutions which are a little more technical and require certain knowledge. The link is this.
Last but not least, I'd like to hear about your situation if you're one of those affected, and especially if you've managed to solve the problem and could share it with others.