A Firmware Update Bricked These HP Printer Models, Here's The Latest On A Fix
The update was released earlier this month, so in truth, if you were going to be hit by this bug, you probably would already have been. There's no fix if you are affected, either. Affected models won't start at all, simply displaying a blue screen with an "83C0000B" error code. The hidden service menu won't come up, so you can't even attempt to install an older firmware version.
HP hasn't publicly commented on the issue, but in a message to security blog BleepingComputer, the corporation says that its teams are "working diligently to address the blue screen error affecting a limited number of HP OfficeJet Pro printers." Affected models apparently include the OfficeJet Pro 9022e, OfficeJet Pro 9025e, OfficeJet Pro 9020e AIO, and OfficeJet Pro 9025e AIO.

HP OfficeJet Pro 9025e AIO, one of the affected models.
Apparently, folks from the US, the UK, Germany, France, the Netherlands, Australia, Poland, and New Zealand have been bit by the bug. It's not clear exactly what the problem is—the error code is impenetrable to anyone outside of HP's internal development teams—but the end result means that the printer is totally unusable for any of its functions.
If you did get struck with this bug, HP wants you to head over to its support site to contact its customer support team for assistance. You will apparently have to send the printer to HP for servicing. It's possible that HP may replace your device altogether, which is a tidy resolution indeed.
Top image from user Bennyboos on HP's forums.