Hi guys, I had what I believe to be a power surge and the HDMI output on my Denon AVR-E300 and the HDMI input on my LG LCD TV no longer work. I tested it with other inputs on the TV with various cables and also tried on a monitor to no avail. So here's what happened:
I was playing a game on my HTPC when the display started to cut out. I ignored it the first time or two but then it became very frequent and then cut out completely. I opened the PC and heard a buzzing noise. I first thought it was the graphics card but then realized that the power supply was the culprit. So I powered down the computer and it continued to buzz. I unplugged it but I still heard more buzzing. That's when I discovered that the TV mounted on the wall was also buzzing. I unplugged the surge protector that all of this was plugged into and went to investigate. Then I heard more buzzing in the kitchen and heard the microwave buzzing and the fluorescent lights in the garage were pulsing.
I got my multimeter and measured the voltage at the wall. It looked a little above normal (~124 V). A while later I measured the incoming voltage to my house and saw that it was about 126 V on one of the leads. 126 V is the level of concern for them, ±5% of 120 V. So I called the power company out but by the time they arrived it was lower. They said it was potentially a problem on their end but would not admit fault in their report. Something about possible ground amps. They told me to call back again if it happened later. That was Sunday and it hasn't happened again.
I am planning on taking the receiver in tomorrow for warranty service. The TV is out of warranty but functions fine, minus one HDMI port. I only use one input because I use the receiver for switching video sources. I believe everything else is fine.
So my questions are:
1. Does this seem like a surge from the power company? Or an electrical problem from within my house?
2. Is the failure of the HDMI ports caused by one the devices malfunctioning and then passing a high voltage to the other connected one? e.g. The TV producing a high voltage via HDMI and blowing the HDMI board in the receiver.
3. What do I do to prevent this in the future? UPS? The surge protector I had installed (Belkin) did not stop this from happening.
4. How likely is it to make a successful claim on a surge protector guarantee?
5. Should I do anything with the computer to make sure all is functioning properly? It seems fine but I don't use every feature of the motherboard.
I appreciate any responses and for taking the time to read my post. Thanks!
I was playing a game on my HTPC when the display started to cut out. I ignored it the first time or two but then it became very frequent and then cut out completely. I opened the PC and heard a buzzing noise. I first thought it was the graphics card but then realized that the power supply was the culprit. So I powered down the computer and it continued to buzz. I unplugged it but I still heard more buzzing. That's when I discovered that the TV mounted on the wall was also buzzing. I unplugged the surge protector that all of this was plugged into and went to investigate. Then I heard more buzzing in the kitchen and heard the microwave buzzing and the fluorescent lights in the garage were pulsing.
I got my multimeter and measured the voltage at the wall. It looked a little above normal (~124 V). A while later I measured the incoming voltage to my house and saw that it was about 126 V on one of the leads. 126 V is the level of concern for them, ±5% of 120 V. So I called the power company out but by the time they arrived it was lower. They said it was potentially a problem on their end but would not admit fault in their report. Something about possible ground amps. They told me to call back again if it happened later. That was Sunday and it hasn't happened again.
I am planning on taking the receiver in tomorrow for warranty service. The TV is out of warranty but functions fine, minus one HDMI port. I only use one input because I use the receiver for switching video sources. I believe everything else is fine.
So my questions are:
1. Does this seem like a surge from the power company? Or an electrical problem from within my house?
2. Is the failure of the HDMI ports caused by one the devices malfunctioning and then passing a high voltage to the other connected one? e.g. The TV producing a high voltage via HDMI and blowing the HDMI board in the receiver.
3. What do I do to prevent this in the future? UPS? The surge protector I had installed (Belkin) did not stop this from happening.
4. How likely is it to make a successful claim on a surge protector guarantee?
5. Should I do anything with the computer to make sure all is functioning properly? It seems fine but I don't use every feature of the motherboard.
I appreciate any responses and for taking the time to read my post. Thanks!