I bough a oxigent concentrator apparatus ,does not work!!

Put some Bar Seal in it and don't worry where from. If you can't see where it is leaking, it may be leaking in the cylinder head. Is your oil okay?

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Aug. 15, 2019 - Bar's Leaks 1196 Radiator Stop Leak Seal the leaks in your radiator with this concentrated formula. It works to seal small leaks in your radiator or heater core. Bar's Leaks manufactures this product in the United States. One bottle can treat up to 4 gallons.

Hi, Serge for this scenario you will need your service manual that has all fastener torque specs -fluid capacities and a wiring diagram on the back pages, parts fiche, and owners manual if you can not find the best tool you ever bought for your Harley, despair not, for a mere zero $0 you can download another one.
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Take it back to where you bought it and see if you can return it or at least exchange it.

clean apparatus

they are on the exhaust system and min of 2 per side

My mother has one of these units, it was working fine until recently I took it to play with it, and found the same problem you describe. The unit works with the power supply (what some people call the "cord") attached directly to the unit, it works through the connector on the power pack itself, but the LED on the battery is not on as used to. I opened the battery pack and found it has an electronic board close to the power connectors, that board might be defective now, yours might be have the same problem. I'm an electronics tech, but I can't fix that board with surface-mount compontens.

Solution: Contact Haier to see if you can purchase the battery pack. In my case I could replace the internal charging board, if they sell it separate, which I doubt but never hurts try contact the factory.

try a universal remote or look up in google for a remote/manual of that model. you can also directly contact the manufacturer.
Good Luck!

The yellow is usually the video connector the the other two connectors would be for the right and left channel sound hook-ups.Hope this helps you with you problem.