The answer to 'lawn dead trees' is that there can be several common causes for dead trees in a lawn, including disease, pests, drought, and physical damage. Symptoms may include wilting leaves, discoloration, and a lack of new growth. Solutions can range from pruning and treatment to complete tree removal, depending on the severity of the issue.
If the problem is caught early, homeowners may be able to address it through DIY methods like watering, fertilizing, and applying pest/disease treatments. However, for more advanced or widespread tree issues, it's best to call in a professional arborist or landscaper to properly diagnose and resolve the problem.