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Disc has been loaded upside
down. Place the disc with the label side up.
Disc region code does not
match region code of the player.
Disc type is not the correct
type to play.
Disc is damaged or dirty.
Clean the disc or try another.
Moisture may be condensed
inside the unit. Remove the disc and the leave the power on
for one or two hours.
Finally the OPU, optical pickup unit contain too the lasser beam, NOT are reading the TOC of disk,+Syscon can be defective. You must go to the repair shop TV for fix it. this a complex equipment. see tje block diagram. God bless you
No power at all from the unit? there is likely to be a fault in the switchmode power supply, which can be caused by any number of components, including leaky electrolytic capacitors. With any SMPS service, all the caps must be replaced together to ensure reliability, along with any IC regulators and diodes which may have been damaged by the faulty caps. If the PSU also features a chopper transformer, this may have an open-circuit winding. Either way, this would require workshop attention by a qualified technician with adequate equipment, and access to replacement parts.
Best option is to submit the unit to an authorised service centre, obtain a quote on the likely cost(s) involved, get a second opinion; then you can make a firm decision on whether it is economical to pursue the repair or not. Up to you.
A dead machine is not always just a simple blown fuse. The cost of the repair will depend on the extent of the original failure in the power supply and whether it has affected anything else in the unit.
You can replace the fuse (if the unit is not under any warranty) by carefully opening the top cover - the fuse is a small glass tube in the power supply (near where the cord connects) check its rating and voltage (the replacement MUST match the original). You should be able to reach this easily without further disassembly of the unit.
If replacing this inexpensive part does not restore any power to your unit, then you have a faulty/defective power supply circuit - this should really be tackled in a fully equipped workshop with adequate facilities by a qualified technician; it is not meant for end-users to repair when it fails due to the potential dangers involved. Experience suggests in many cases a dead unit is not just a blown fuse, but a switchmode power supply failure.
Try replacing the fuse first - then consider submitting unit to a service centre for a quote, then you can decide afterwards if it's economical/worthwhile repairing.