Rxv850

If your Yamaha RX-V850 receiver is not powering on, even though you have confirmed that the transformers and other components are in good condition, there may be several possible causes:

Blown fuse: Check the fuses in the receiver's power supply and main board to see if they are blown. If you find a blown fuse, replace it with a fuse of the same type and rating.

Faulty power supply board: The power supply board may have a faulty component or a bad connection that is preventing power from reaching the rest of the receiver. Consider checking and testing the power supply board, and repairing or replacing any defective components.

Failed main board: If the power supply board is working correctly, but the receiver still won't power on, the main board may be faulty. You may need to replace the main board with a new one.

Faulty power switch: Check the power switch to see if it is working correctly. If the power switch is faulty, it may need to be replaced.

If you are not comfortable performing these troubleshooting steps yourself, you should consider taking your receiver to a professional repair technician for diagnosis and repair.

If your Yamaha RX-V850 receiver is not powering on, despite the transformers and other components being good, there are a few potential causes and solutions:

1. Check the power cord: Make sure that the power cord is properly plugged into the receiver and the electrical outlet. Try plugging the cord into a different outlet to see if that resolves the issue.
2. Check the power switch: Make sure that the power switch on the receiver is turned on. Sometimes, the switch can be accidentally turned off, so double-check to make sure it is in the correct position.
3. Check the fuses: Check the fuses in the receiver to see if any of them have blown. If you find a blown fuse, replace it with a new one of the same type and rating.
4. Check for loose connections: Make sure that all the cables and connectors are firmly seated in their sockets. Loose connections can cause the receiver to fail to power on.
5. Check for internal damage: If none of the above steps resolve the issue, there may be internal damage to the receiver that requires repair or replacement. In this case, it is best to contact Yamaha's technical support team or a professional technician for further assistance. They may be able to diagnose the issue and recommend a repair or replacement solution.

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s jagadeesh