HELP!!!... A700 Camera piece came out while shooting......

Sorry for the late reply my A700 had the same problem and if u keep using it without that bracket the mirror tends to come down and when taking a picture it would get stuck when the mirror lifts up or delay in taking pic and shut down. Finally got a few spares just in case and replaced the mirror ( had scratches from previous cleaning) and the bracket holder. But if u do it urself u have to use rubber gloves so not to leave finger prints on mirror. Hard to clean if u do! Thanks