Yamaha wc55280 power button does not work

I would normally suggest a power supply issue. Does the display flicker if you move the power plug, if so this is a common fault, replace socket.
If it is not power related then as it works, charges up, squeal then suggests possibly a capacitor charging up and discharging.

Resetting Instructions:
1) Try a partial reset by holding down the last white key while turning the unit ON.
2) If you haven't recorded any performance(s), for a full reset, hold down on the last white key AND THE lst three black keys while turning the unit ON.

Hold down the power button until it starts up again.

I am restoring a 1982 Yamaha Virago 750. The OEM horns were shot so I replaced them with standard 12 automotive horns. The problem is that when I push tht horn button with both horns connected, the system won't deliver enough power to run them. However if I disconnect either horn, the other one will work. It seems like the system can't deliver enough current for one. If I connect the two horns direct to the battery they work jsut fine. Is this an electrical system problem (diode, regulator, horn switch, bad ground?) or should I rewire with an aftermarket relay for the horns?

DVD reset procedure for TH-A10
1. Make sure there is no Disc in the tray.
2. Disconnect the power cord.
3. While Pressing "Stop" and "Open/Close" buttons together reconnect the power cord
4. Front display will show "TEST0".
5. Then the display will change to : "TEST1 JC2".
6. Press "Enter" button on the remote, display will show "EEPROM"
7. Press "Power" to shut unit off.
8. Reset is finished

HI my Yamaha is working fine exept input selector , I selilng it for parts 45 , amp working fine exept inputs ( one milti channel in works fine) [email protected]

Los receivers traen un transformador este trae un fusible termico quizas este dañado por eso no enciende.O los amplificadores de audio estan dañados checa desoldandolos.

V2712300 power relay

The same happened to me! DVD's play fine but on screen menu just changed and Video Output option is gone! Also de Philips logo on screen which I suspect is placed there by my TV (which is a Philips one) and as it does no longer receive the background screen from the DVX it just puts its own. Is your TV Philips like mine?