Pioneer VSX-D412 AMP-ERR message.

amazon HCDZ Replacement Remote Control for Pioneer AXD7246 XXD3038 XXD3039 VSX-D412 VSX-D412-K VSX-D412-S VSX-D309 Audio Video Multi-Channel Receiver

I also have the VSX D412 and DirectTV. My DirectTV remote controls the D412 fine, but I did have the same problem you're experiecing with a Sylvania flat screen that the remote wouldn't operate. I corrected my problem by turning the TV off, then back on using the TV's remote, then telling the DirectTV system that I didn't know the model number and let the system search for the code. Hope this helps.

PDF]VSX-D414 VSX-D514 - Pioneer

www.pioneer-latin.com/downloads/xre3077a.pdf

Increase the separation between the equipment and receiver. - Connect the .....AUDIO/VIDEO MULTI-CHANNEL RECEIVER VSX-D514. RCE. VSB. MODE.

Pioneer VSX-D514 Receiver Repair Questions,... - Fixya

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Recent Pioneer VSX-D514 Receiver questions, problems & answers. Free expert DIY tips, support, troubleshooting help & repair advice for all Audio & Video ...

app err Turns on then says amp err. - Fixya

The unnamed TV's manual would give some guidance about ITs end. As would this one...

http://www.pioneerelectronics.com/PUSA/Search?keywords=vsxd412

http://www.pioneerelectronics.com/StaticFiles/Manuals/Home/VSX-D412_OperatingInstructions0224.pdf

Its software setup is corrupted so you have to buy another one then install it again

You have a defective amp ic.either ic601 or ic602 will be bad you will also have an open fuseable resitor in the channel where the ic is bad. ic numbers are PAC010A AND PAC011A

Yes, both receiver and tv have optical/digital connectors, or alternatively, the S-video connector. The Pioneer will decode the compressed 5.1 signal coming from the tv unit.

you have a bad cable

Hello,
The subwoofer is totally independent from your Pioneer VSX-D412. You can check if it works like you did with a finger on the hot point of the RCA cable (not very good test, as you will hear noise and can't say if that means it works OK) or better connect a known receiver to the speaker connections in the sub and test to see if it’s working properly.
Regarding the receiver, you may not have enabled the VSX to output to the sub. Read the manual on how to check for that. Only Dolby Digital 5.1 signals will allow the sub out, in a receiver of this level. It normally will not let you use the sub in stereo mode. Some more complex units will allow you that, but I believe not this model.
Good luck

This is the same as "protect" mode. Basically the unit has detected a problem with the output stage of the amplifier and has shut down to prevent further damage. Usually this is caused by defective output transistors. Expect a parts cost in the range of $15-$40. Add in the local labor rate for the total repair bill.
Dan