I have a 5.1 channel Yamaha RX-V475 AV receiver, to which the centre and surround speakers, along with the subwoofer from a Wharfedale DX-1se package are connected. For the front left and right channels, I use an old pair of Tannoy Mercury M3 floorstanders. The Tannoy speakers were purchased back in the late 1990s as part of a stereo setup, and I've had the Wharfedales since last September. The AV gear is located in upstairs bedroom.
A few weeks ago there was an issue with the electricity supply in the local area, which amongst other things, caused the television downstairs to keep turning on and off from standby, and an electric shower to fluctuate in temperature and its power indicator to flicker, accompanied by quite loud hum. To prevent damage to my bedroom av equipment from a possible power surge, I unplugged it all from the mains and disconnected the speakers, only reconnecting and plugging everything back in again one the power had returned to normal later that day.
Several days later I had to reverse the receiver connections for one of the speakers, as the front right channel sound appeared somewhat distant and hollow, suggesting that this speaker was out of phase, having been incorrectly reconnected. Once this was done, and it was established there were no loose speaker or HDMI connections at the back of the receiver, it was turned on again. However, after the Yamaha receiver had been in use for just over three quarters of an hour, unexpectedly it completely stopped outputting video and audio signals. I don’t recall this ever happening before. As a result, I couldn’t hear any sound coming from the connected speakers, neither was there any video image from my blu-ray player appearing on the television. The receiver’s power saving mode was engaged, but 1080 appeared in the top left of the display where ECO is usually shown. I tired turning the receiver on and off a number of times, but that didn’t rectify the issue, as while the usual two clicks were heard when powering on and the HDMI out indicator appeared as normal, the problem remained. It was only when the receiver was switched off and left for a couple of hours, before being turned back on and then switched from HDMI1 to another input, then back to HDMI1 again, that ECO appeared on the display and the receiver’s video and audio output were restored.
While the receiver is now working correctly once more, I’m wondering what could have caused the problem. Even though it wasn’t used at all on the day of the electricity fault, and the following weekend was the first occasion the receiver was turned on since, is there any chance a fluctuating mains supply could have put the receiver into protection mode? Would an out of phase speaker have been the cause of my problem, or perhaps a speaker impedance issue, as there seems to be discrepancy regarding the Wharfedale DX1se speakers. In the user manual the impedance is given as 8 ohms compatible, while on the back of the speakers themselves, it’s stated as 4 ohms. The old pair of floorstanding Tannoy speakers have, I believe, an impedance of 8 ohms. Since I don’t often run the volume level higher than -30, and much of the time it is lower than this, I don't think that overheating could be factored in as a possible cause, for at no point did the receiver automatically power off, even though the receiver does seem to run hotter than when I used it with my previous Yamaha NSP110 speakers.
As I’m not completely certain as to why the issue occurred, and am wondering what the chance is of a similar problem in the future, does anyone know what most likely resulted in a total loss of audio and video output from my Yamaha RX-V475 receiver for a time several weekends ago?
A few weeks ago there was an issue with the electricity supply in the local area, which amongst other things, caused the television downstairs to keep turning on and off from standby, and an electric shower to fluctuate in temperature and its power indicator to flicker, accompanied by quite loud hum. To prevent damage to my bedroom av equipment from a possible power surge, I unplugged it all from the mains and disconnected the speakers, only reconnecting and plugging everything back in again one the power had returned to normal later that day.
Several days later I had to reverse the receiver connections for one of the speakers, as the front right channel sound appeared somewhat distant and hollow, suggesting that this speaker was out of phase, having been incorrectly reconnected. Once this was done, and it was established there were no loose speaker or HDMI connections at the back of the receiver, it was turned on again. However, after the Yamaha receiver had been in use for just over three quarters of an hour, unexpectedly it completely stopped outputting video and audio signals. I don’t recall this ever happening before. As a result, I couldn’t hear any sound coming from the connected speakers, neither was there any video image from my blu-ray player appearing on the television. The receiver’s power saving mode was engaged, but 1080 appeared in the top left of the display where ECO is usually shown. I tired turning the receiver on and off a number of times, but that didn’t rectify the issue, as while the usual two clicks were heard when powering on and the HDMI out indicator appeared as normal, the problem remained. It was only when the receiver was switched off and left for a couple of hours, before being turned back on and then switched from HDMI1 to another input, then back to HDMI1 again, that ECO appeared on the display and the receiver’s video and audio output were restored.
While the receiver is now working correctly once more, I’m wondering what could have caused the problem. Even though it wasn’t used at all on the day of the electricity fault, and the following weekend was the first occasion the receiver was turned on since, is there any chance a fluctuating mains supply could have put the receiver into protection mode? Would an out of phase speaker have been the cause of my problem, or perhaps a speaker impedance issue, as there seems to be discrepancy regarding the Wharfedale DX1se speakers. In the user manual the impedance is given as 8 ohms compatible, while on the back of the speakers themselves, it’s stated as 4 ohms. The old pair of floorstanding Tannoy speakers have, I believe, an impedance of 8 ohms. Since I don’t often run the volume level higher than -30, and much of the time it is lower than this, I don't think that overheating could be factored in as a possible cause, for at no point did the receiver automatically power off, even though the receiver does seem to run hotter than when I used it with my previous Yamaha NSP110 speakers.
As I’m not completely certain as to why the issue occurred, and am wondering what the chance is of a similar problem in the future, does anyone know what most likely resulted in a total loss of audio and video output from my Yamaha RX-V475 receiver for a time several weekends ago?
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