The phrase "announced a problem" is correct and usable in written English.
You can use it when referring to someone who has made a declaration or statement regarding an issue or difficulty that has arisen.
Example: "During the meeting, the manager announced a problem with the project's timeline that needed immediate attention."
Alternatives: "reported an issue" or "raised a concern".
The title of the 10th New York gallery show of Kathy Butterly, the immensely talented and original ceramic sculptor, announces a problem borne out by its contents.
Then, after consulting with experts U.S. Treasury Secretary Henry Paulson announced a slight problem and told the American consumer, we'll help you continue to spend.
Ronald Reagan's declaration, in his 1981 inaugural address, that "government is not the solution to our problem; government is the problem" announced a new era.
The Delta and Northwest pilot groups, who were asked by management to negotiate a seniority agreement before a merger deal could be announced, share a problem with their contentious colleagues: there is an age mismatch, with Delta employing the younger group.
However, having announced a fix for the problem at the beginning of this month, Toyota found itself on the back foot again as news spread of a software-related brake problem on the latest version of its iconic Prius hybrid.
Indeed, on Tuesday, Secretary of Education Margaret Spellings, tacitly acknowledging the problem, announced a program to give up to 10 states permission to focus their remedies mostly on schools that are drastically underperforming as a whole rather than those that are struggling with one group of students, like the learning disabled.
The Yonkers job was offered after his transfer to Harrison was announced, a transfer that posed problems for him because he lives in Yonkers and doesn't drive.
This makes it even more incumbent on Clinton to announce a firm, problem-solving, action program that will tackle head-on the big ticket concerns of voters from jobs and the economy to security.
Annan, to his credit, did more than just deplore the problem: he announced a zero-tolerance policy, commissioned a seminal report on the issue, and helped the UN to institute several reforms.
Meanwhile, Scottish Labour leader Jim Murphy has announced a commission to address the problem of low pay in Scotland.
