Vsx-516-k pionneer amplifire i have no power at all what is the problem u thing the fuse is ok

Try holding the "advanced surround" and "enter" buttons and see if it turns back on. If it shuts off again, disconnect all speaker wires and try it again. If it stays on, you have a bad speaker or wire. If it still shuts down, the amp is blown and needs to be repaired.

The subwoofer for that system also powers the rest of the speakers as well as the
subwoofer as you probably know. Is there any power light coming on? Like on the subwoofer itself where ever the power light is. If not check for a fuse. If no fuse is visable you'll have to take the subwoofer apart, the plate amplifire. There will be screws all around the metal part on the back, you must remove all the screws holding it together. Most of these types of systems have the fuse inside on the board. Also sometimes the fuse does'nt look like a fuse, it could look like a resistor or a ceramic style disk capacitor. Yours will probably have a glass type fuse. If you don't see one look on the board next to the components on the power supply board or if all together look near the transformer area for a F meaning a fuse. /there will be letters and numbers next to each component eg., resistor, capacitor, diode, etc. If you find a glass type fuse replace it with the exact same rating which will be on the end of the fuse on the silver ends of the fuse. If it's not blown you'll need to test to see if your getting voltge out of the transformer. You'll have to have the DVD unit hooked up to it, you don't have to have any speakers connected. The cable from the DVD unit to the subwoofer is what tells the amplifire on the subwoofer to turn on. You could have a blown amplifire IC. I don't know what type of ouput amplifires this uses but I'm thinking IC and not seperate transistors for the output amplifires. You might have one of those blown and if you do then the whole system wont work. Hopefully if that is the problem you'll see a burnt mark on the IIC itsel or some type of burnt spot on the board somewhere to lead you in the right direction to the problem. It could be as simple as a power supply capacitor, who knows til you get into it and start looking around and testing some things. If you don't have the knowledge to do this I am the cheapest electronics business in the USA. It's not a bad system, CrutchField sales it. Also I can waalk you through the steps to narrow the problem down. I help people everyday. You can contact me at ampman37@gmail.com. I can then give you some more info and my business phone number if you feel up to doing this. It's really no big deal and I find that most of my customers who have never done something like this love and learn some electronics and now fix some other stuff they had laying around. I'm here to help. Thank you for contacting me, have a good day.

You may have tuned in a program that advertizes DTS, but, the local cable company may not send it through their atiquated cable network.

That is a good thing, your receiver is going into "protect mode" that means the receiver is shutting down to keep from damaging delicate internal circuitry, it is sensing a speaker bottoming out or some other electrical "short" that could be damaging!
Also could be from over driveing the amp and then it starts to overheat thus going into "protect mode".
If your speakers are "clipping or distorting" turn it down, you are going to ruin your amp. Good luck !

Check the speakers one by one maybe there is one bad or almost damaged

This sounds like the amp has a system memory problem. The chips inside your amp that deal with it might be faulty or they loose the information due to a power loss, often caused by memory retention capacitors.
You can tell that to the repair man and see what he says, but personal I would go to another, try contacting Pioneer for a recommended engineer in your area.

www.stereomanuals.com
G12 price code = $21.00 + $2.00 shipping

Pioneer VSX-3700S AV Receiver Service Manual = G12
COMMENT: (1990) Also VSX-3600, VSX-3900S, VSX-3800, VSX-411S, VSX-401. (IMPORTANT NOTE) Circuit Diagrams and PCB Pattern Layouts (and Exploded View, Parts List) only, balance (if any) of manual on (1) (not included) microfiche card. There are some separate manuals which are almost entirely for the Remote Controls: for VSX-411S and VSX-401, see VSX-411S. for VSX-3900S and VSX-3800, see VSX-3900S.
STOCK# = PIOVSX3700S-SM
DESCRIPTION: 56 total pages (18 intentionally blank), constructed as the original including (almost entirely) 11in x 17in folded /trimmed pullout pages, card stock covers, neatly assembled with 5 staples and fiber reinforced taped spine. Models covered: VSX-3700S, VSX-3600, VSX-3900S, VSX-3800, VSX-411S, VSX-401. Overall quality is Very Good.

The audio amplifier IC of your device are fried

Go to the Pioneer website, put in the model and it will prompt you the rest of the way.

If I am not mistaking here, you need a self powered subwoofer to use with this unit. Those are line driven outputs for this unit. Make sure there is a wall plug on the sub that is plugged in. Good Luck