32" Sony KV-32FS120
 

Pointer: call a qualified technician that has the equipment, service
information, and training to to work on the set.

Hint: Symptom indicates the tv is going into some kind of protect mode
shutdown, since all modern tv sets go into protect shutdown when there
is a fault in anywhere between 3 to 30 different critical circuits, the
generic symptom as you described is common, but the faults are not
common.