Um teste de burn-in significa simplesmente que o produto adquirido foi testado pelo fabricante antes de ser embalado para o vendedor ou a loja:
Burn-in is the process by which components of a system are exercised
prior to being placed in service (and often, prior to the system being
completely assembled from those components).
The intention is to detect those particular components that would fail
as a result of the initial, high-failure rate portion of the bathtub
curve of component reliability. If the burn-in period is made
sufficiently long (and, perhaps, artificially stressful), the system
can then be trusted to be mostly free of further early failures once
the burn-in process is complete.
A precondition for a successful burn-in is a bathtub-like failure
rate, that is, there are noticeable early failures with a decreasing
failure rate following that period. By stressing all devices for a
certain burn-in time the devices with the highest failure rate fail
first and can be taken out of the cohort. The devices that survive the
stress have a later position in the bathtub curve (with an
appropriately lower ongoing failure rate).
Thus by applying a burn-in, early in-use system failures can be
avoided at the expense (tradeoff) of a reduced yield caused by the
burn-in process.
When the equivalent lifetime of the stress is extended into the
increasing part of the bathtub-like failure-rate curve, the effect of
the burn-in is a reduction of product lifetime. In a mature production
it is not easy to determine whether there is a decreasing failure
rate. To determine the failure time distribution for a very low
percentage of the production, one would have to destroy a very large
number of devices.
When possible, it is better to eliminate the root cause of early
failures than doing a burn-in. Because of this, a process that
initially uses burn-in may eventually phase it out as the various root
causes for failures are identified and eliminated.
For electronic components, burn-in is frequently conducted at elevated
temperature and perhaps elevated voltage. This process may also be
called heat soaking. The components may be under continuous test or
simply tested at the end of the burn-in period.
There is another use of the term by some audiophiles, who leave new
audio equipment turned on for multiple days or weeks, to get the
components to achieve optimal performance. However, many debates have
arisen about the benefits of this practice.
No seu caso específico, significa que seu monitor foi testado por 24 horas antes de ser embalado.