Question about Harman Kardon AVR 85

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The unit turns itself completely off and won't power back on. After a while (10-30 minutes) it will finally come back on. It is in a well ventilated area and does not appear to be getting over-heated. Any ideas?

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Cold solder joint on the board, major problem on all AVR85s.

Posted on Nov 18, 2011

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Well I'm not a T.v. expert but sounds similar to over heating problems. Is the ventilation covered or filled with dust? Try unplugging it and take an air can to the vents to blow out any dust it's collected over the years.

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If the unit does not spin correctly, this is usually an indication that the unit can also not drain. The unit will not spin if it senses a blockage or issue with the drain lines and/or pump. Try to check the drain lines in the back of the unit for any issue, and then see if you have an access panel to get to the coin trap or drain pump itself. Often socks and debris will clog up in this area and cause your problems.

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According to the user manual, the fourthj LED flashing (Error D) means that a thermal (heat) shutdown happened. If Error D, Thermal shutdown, is indicated, turn off the Sound Bar and verify the ventilation slots in the Sound Bar are clear, the Sound Bar has proper ventilation and is not being operated in an environment
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If it is propane powered, you will need to "Bleed-out" the air from the tank to the unit.
What I did with mine was to open the access door, make sure the gas is on, then allow it to fill the lines by turning-on the unit w/o starting it.
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Similar situation as previously described with the Denon AVR-1508, but mine will shut off after about 10-12 minutes the first time around and then ~2 minutes after it is turned off and then back on. Unit...


Most new receivers have a fan on the back, if you have one check to make sure it is working, most won't activate until the unit gets warm, other issues are bad solder connections on the audio outputs causing intermittent shutdown, as a final inspection check speaker connections to the receiver and speakers.

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My AVR280 keeps turning off by itself. After turning the unit completely off, I wait for a few minutes then I can turn the unit back on. I am now just under 2 months out of warranty. Any help would be...


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

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Unplug,replug the tv back like 24 hrs later.That the whole tv is resetting itself everythings.Tv now should be working again.If still have the same problems,than ur tv DM power supply board is have dying parts,must repair the tv DM power supply board to fix the tv.

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I had the same problem and it costs 200.00 dollors for the lamp that bad

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