Power can not turn on for Yamaha RX-V520

This will almost certainly be a problem with the power supply, a faulty part. Unless you have experience of repairs to power supplies, due to the high voltages, I suggest you take it to your local authorised Yamaha Repair Centre.

Try disconnecting everything from the back of the system and unplugging it form the wall for a couple of minutes. Plug it back in and try poering it on. You may google search "diagnostics boot" or "error boot" with you model number and see what comes up. There is a fuce inside you could check, usually to the back right on Yamaha receivers. This doesn't sound likely due to your subwoofer sound though....maybe.
I bought about 70 receivers that were last years models from Yamaha, Denon, Sony Bravia, etc. Most worked but some required fixing. Some where easy as fuses, blown capacitors (visually), then some are still in my storage LOL. I hope this helps. By the wy, you can always purchase a repair/diagnostics manual that repair shops use with diagrams and trouble shooting tips for your particular model.

GOoD luck

hello check the glass fuse inside.warning if you put another 1 in and blows again then there's a dead short somewhare

regards
shaun

Check the fuse. You might have had a power surge which blew a fuse. If not, check the fuse for the socket. Reset the fuses for that socket. If it still doesn't work, it sounds like the internal boards got fried, or the power supply got fried. The power supply is replaceable, but we don't know if it is the power supply. To check, connect a voltage meter to the power supply.

Something like this happened to me. I found a new kenwood stereo next to the dumpsters, stickers and all still on it, plugged it in, it worked, shut it off to plug in a speaker, didn't turn back on, months later after leaving it plugged in, turned on, I used it, then shut it off for the night, in the morning the standby light was still on, tried turning it on, but it wouldn't for some reason, unplugged it, then the light wouldn't come on, it was once again sitting on a shelf as a paperweight, one day it randomly came on again, and now it 100% works, and I use it as an amp for my RE audio subwoofer, and its worked great since! The reason this kinda applies to you is because its kinda simmilar what happened to you. Just leave it plugged in, and maybe sometime you will walk by it noticing it works.

It depends on a model of the receiver. If there is no any lights check standby power supply. You can find it by looking for a small transformer (1" by 1" approx.). Standby power supply usually provide 5 volts ( sometimes 9v or 12v). Look at connectors close to standby power supply which has a pins marked as 5STBY or STB5V etc and check voltages. If there is no standby voltage repair that power supply

check the standby power supply first and then the main power supply.also check the output transistors and fuses your problem is in one of those points, normally the standby transformer goes bad, it is the small one right next to the big one.
good luck

I had a similar problem. I have RX-V2500. No power to it when plugged it. Unplug then plug in again. Everytime you hit standby you get a click, which happens three timesand then no clicks until you unplug and replug.

I popped the cover off and just inside, where the power cable attaches, there was a white fuse. I think it was a 10A/250V (I'm in Canada), but read what the spec is on your fuse. I replaced this and it worked just dandy. Believe me - I was as surprised as the next guy.

Anyhow - hope that helps.

Obviously make sure it isnot connected to the power supply at all when you remove the cover.

If you don't have any speaker wires hooked up to it and it won't turn on, the only thing left to check is the internal fuse. First, make sure it's unplugged from AC, then remove the top from the receiver, 6 or 7 small phillips head screws. At the back inside corner where the AC comes in there is either one or two fuses, check them. If you have a multimeter, dial it to resistance & sound (meaning when the two probes touch you will hear a tone) touch both ends of the fuse with the probes, if you get tone, fuse is good, if not, replace the fuse and all should be well. If you get tone, you've got either bad transistors or a bad power supply. Could be a 100-200 repair. Hope this helps

If the standby voltage exists, the next step is to see whether or not the clock is working. Find the main micro chip. There should be a 3 legged crystal close by. You should see this oscillate (use a scope). No oscillation = no micro control = no turn on. It is possible that the micro is bad or the crysal is bad. Also, check to be sure that the output transistors are not shorted. It is also possible that these are preventing the system from turning on.
Dan

Change the backup capacitor 0,047F 5,5 V on the underside of the front PCB.