Press on sony remote in this order "display - 5 - volume dn. - power" to see self diagnostics. But to fix it you'll need a tv repairman to fix the Zero Cross Detect circuit.
Was this helpful?
Yes
No
Popular Solutions for Sony KP-57WS520 57 in. Rear
Sony KP-57WS520 57 in. Rear Projection HDTV-Ready Television