Question about Denon AVR-1804 Receiver

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Unit keeps shutting off

Everytime I power on the unit the standby led comes on; the unit then powers down after 5 seconds.

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Protection circuit activating. Possibly a shorted amplifier channel or power supply fault. Take it to a Denon repairer

Posted on Jun 07, 2009

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Posted on Jan 02, 2017

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Hi my panasonic CS-PS18NKQ is not working,timer indicator keep on blinking.


• To make a diagnosis
1. Timer LED start to blink and the unit automatically stops the operation.
2. Press the CHECK button on the remote controller continuously for 5 seconds.
3. "- -" will be displayed on the remote controller display. Note: Display only for "- -". (No transmitting signal, no receiving sound and no Power LED blinking.)
4. Press the "TIMER" or button on the remote controller. The code "H00" (no abnormality) will be displayed and signal will be transmitted to the main unit.
5. Every press of the button (up or down) will increase abnormality numbers and transmit abnormality code signal to the main unit.
6. When the latest abnormality code on the main unit and code transmitted from the remote controller are matched, power LED will light up for 30 seconds and a beep sound (continuously for 4 seconds) will be heard. If no codes are matched, power LED will light up for 0.5 seconds and no sound will be heard.
7. The breakdown diagnosis mode will be canceled by pressing the CHECK button continuously for 5 seconds or without any operation the remote control for 30 seconds.
8. The LED will be off if the unit is turned off or the
RESET button on the main unit is pressed.

When you have the error code, you can narrow down the problem.

Feb 04, 2015 | Panasonic Heating & Cooling

1 Answer

Lift masters battery keeps bleeping every 5 seconds,does this means my battery needs replacing.


This is battery related. On top of your unit is a battery pack with three colored led lights. You can tell what is going on by looking at these. This information is in your manual or here it is.
GREEN LED: All systems are normal. A solid LED light indicates the batteries are fully charged. A flashing LED indicates the batteries are being charged. NOTE: Batteries do not have to be fully charged to operate the motor unit. YELLOW LED: The motor unit has lost power and is operating off of the BBU. A solid LED with beep, sounding approximately every 2 seconds, indicates the motor unit is activating the door and is operating off of the BBU. A flashing LED with beep, sounding every 30 seconds, indicates batteries are low. Once the power is restored the BBU will recharge. This is indicated by a flashing green LED. RED LED: An error has been detected and the BBU will automatically shut off. The BBU will attempt to restart by reconnecting to the batteries. If the error is still present it will shut itself off again. This process will repeat every 5 minutes or until the error has been resolved. This is used to prevent further draining of the batteries. If a red LED remains on when the power is restored, and is accompanied by a beep sounding every 30 seconds, please call for service.


Jan 15, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Panasonic PTL500 LCD HIDEF projector - Unit occasionally powered up briefly, lamp lit, then shut down, standby LED flashed orange/red. Sometimes lamp lit and sometimes not. Technician diagnosed bad ballast...


The bulb is a discharge type - it needs a very high tension to work. The role of the ballast board is to convert the low voltage DC current coming from the power source in a high tension DC current for the bulb. Unfortunately you were truly unlucky : when the ballast board died it sent a high tension surge thru the power source and from there at the other components on the mainboard - the processor couldn't handle it and got fried. So now when you try to start the projector this is what happens: the power source starts normally - the status light goes to green as it should; it functions normally so it powers the ballast board and the rest of the mainboard - the ballast works so the bulb lights up; the mainboard on the other hand remains dead because the processor is dead so no sustain signal is sent to the power source; without the sustain signal the power source goes, as it should , in an very normal stand-by - the status light goes to red.
The entire mainboard will have to be replaced - you can't replace just the processor, it's glued in there. This is going to be expensive so ask a quote before doing it.

Dec 23, 2010 | Televison & Video

1 Answer

Panasonic PTL500U LCD HiDef projector. Unit occasionally powered up briefly, lamp lit, then shut down, standby LED flashed orange/red. Sometimes lamp lit and sometimes not. Technician diagnosed bad ballast...


If you take the back off you might find a couple of bulged electrolytic caps on the power supply board that need change, or just buy a new power supply at www.partstore.com

Dec 22, 2010 | Televison & Video

2 Answers

I have a Graco baby monitor, it started making a noise for the last 2 days, could it be a battery problem (even with power connected)? The monitor is about 1.5 years old.


Annoying! happens to us too frequently, but this works. We ended up buying a new one and returning our broken one after owning for three months From Manual:) 5. Turn on the Nursery Unit using the On/Off switch on the side. The green power light should come on. 6. Within a few seconds, the Parent Unit will lock on to the Nursery Unit and the top four (4) green LEDs will shut off. A second later, you will hear a series of beeps and the connection LED should change from red to green. Your monitor is now ready for use. 7. If the top four (4) LEDs do not shut off, power off the Parent Unit and the Nursery Unit and repeat steps 4 and 5 above. 8. If the connection LED on the Parent Unit does not change from red to green and the unit begins to beep, press the channel "ch" button on the Nursery Unit. Within a few seconds, the Parent Unit should lock in on the Nursery Unit and the connection LED should change from red to green. You may hear an audible beep during this process. 9. If the Parent Unit is still unable to lock in on the Nursery Unit (connection LED will be red and the unit will beep), power down both the Parent Unit and the Nursery Unit. Wait for 10 seconds then hold the volume down button on the Parent Unit while pressing the On/Off switch. When the unit powers up, you will hear a single beep and all of the soundlights will illuminate. Release the volume down switch and within 2 seconds you will hear two beeps and all of the Sound Light LEDs will stay lit and the bottom LED will be red. 10. Repeat steps 5

Oct 12, 2010 | Graco Baby Care

1 Answer

Tv goes blank while viewing


It seems that your unit has some sort of PSU fault, or a problem that is shutting down the Power Supply Unit, PSU. This happens so that no further damage, and possible fire will occur.

You need to take the unit to a reputable service centre/man and ask for a firm "Quote" for the work to be done. It is that re-starting that gives it away, this is a typical switchmode Power Supply problem.

Jan 24, 2010 | Televison & Video

2 Answers

Graco baby monitor just keeps chirping and blinking red. Don't' have owner's manual. Is it needing to charge or what is going on?


Try this. Your hand held unit may not be communicating with the one in the room.

If the Parent Unit is unable to lock in on the Nursery Unit (connection LED will be red and the unit will beep), power down
both the Parent Unit and the Nursery Unit. Wait for 10 seconds and hold the volume down button on the Parent Unit while pressing the On/Off switch until you hear a beep. When the unit powers up, release the volume down switch and within 5 seconds press and hold the volume down switch again for at least 2 seconds. All of the Sound Light LEDs should illuminate and the bottom LED will be red.

I hope this helps.

Apr 10, 2009 | Baby Gear

1 Answer

I have a digistat scr with a flashing red light and no heating there is nothing wrong with the batteries, this only occured after a poweer cut.


Try this first before condeming the unit.

1. Turn off the power supply to the Digistat SCR (receiver unit)
and leave for 5 seconds.
2. Turn on power to SCR unit and check red light is on.
3. Press override button No.2 and check the green light comes
on and boiler fires.
4. Press & hold down button No.1 (Keep depressed), then
press No.2 and keep depressed. {The Red LED light will flash
a couple of times and then it will go out}
5. Now release both the buttons – {the two LED lights should
come back on}
6. Get the Digistat+2RF/+3RF unit and stand two metres away
from the SCR unit with the Digistat+2RF/+3RF unit in your hand.
7. Remove the battery cover and fit the batteries.
8. The Red LED light on the SCR will now flash for approx. 7
seconds.
9. This confirms that the radio signal is being sent and
received.
10. The Digistat+2RF/+3RF and the SCR are now successfully
linked by a dedicated RF address.

Mar 21, 2009 | Water Heaters

1 Answer

Keeps turning off


Your power cord is cutting in and out. You either have a bad power cord or there is something wrong with the connection to the cigarette lighter. When the unit say "Running on battery - will turn off in 30 seconds" this mean that it has lost external power. This is by design so that when you shut off the engine external power is cut to the unit and that it will shut down.

It a shame that for the C330 Garmin decided to remove the LED light from the power cord that shows the power cord is connected correctly to the cigarette lighter.

Jan 15, 2008 | Garmin StreetPilot C330 GPS Receiver

2 Answers

Samsung DLP HL-P5063W


you have the same problem I have. The problem is fixed by changing the new light bulb. The problem appears again after 1500 hours of use. You can keep buying new light bulbs or avoid it by not buying another Samsung TV.

Sep 23, 2007 | Samsung DLP HL-P4663W 46" Rear Projection...

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