TV not turning on at all (not even red light) usually means power supply board issue or burnt fuse. Simple visual inspection.
See if any of these signs match your device — each one increases the likelihood of this fault.
These are the causes we encounter while repairing TV won't turn on — ranked from most to least common.
Burst capacitors on power supply board (most common)
Burnt main fuse on power supply
Bad standby IC on main board
Disconnected internal power cable
Voltage spike burnt power supply
Burnt internal transformer
Any of the following = a danger signal — call now and don't try to fix it yourself.
On-site diagnosis, clear pricing before any work, and a documented 6-month warranty.