How do fix AC adapter is not recognized?

How do I fix my AC adapter is not recognized:

Use of an external power supply allows portability of equipment powered either by mains or battery without the added bulk of internal power components, and makes it unnecessary to produce equipment for use only with a specified power source; the same device can be powered from 120 VAC or 230 VAC mains, vehicle or aircraft battery by using a different adapter. Another advantage of these designs can be increased safety; since the hazardous 120 or 240 volt mains power is transformed to a lower, safer voltage at the wall outlet and the appliance that is handled by the user is powered by this lower voltage. We can provides non-isolated point-of-load(POL) DC/DC converters featuring wide input voltage, output voltage capability, high efficiency and low profile package.It is power supply system this items 12W Ac DC Adapter,It is small size and light body, easy to carry when you travel. High efficiency means power adapter can work for a long time, SCP, OLP, OVP, OCP can guaranteen your safety, an ideal choice for your equipments that need to transform the voltage.the Power Adapter Protection,Over-current Type,Wall DC Connector ,Warranty is 12 Months.if you intersting in it  contact us pls,we will try our best to sent you the best price.

How do I fix my AC adapter is not recognized:

AC input 100-240Vac

Output:18VDC 0.5A

100% high voltage test, 100% aging test, 100% full inspection

Built-in over current, over voltage, over load and short circuit protection

High precision, low ripple and low noise

Super-compact designed, light, handy and portable.

Multiple plug type: US/CN/EU/UK/BS/AU/KC/PSE

How do I fix my AC adapter is not recognized:

2.5*0.7*10mm,

3.5*1.35*10mm,

4.0*1.7*10mm,

5.5*2.1*10mm,

5.5*2.5*10mm,

Micro USB

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Company infomation :

Shenzhen Juyuanhai Electronic Co.,Ltd. was established in 2009, a professional manufacturer specialized in researching, producing and selling products like Switching power adapter, Car charger etc.So far our products have been exported to Europe, North America, Australia, Africa, Middle East and Southeast Asia. All our products enjoy very high reputation among our customers. Warmly welcome domestic and foreign customers to visit our factory and achieve win-win situation.JYH to be the most competitive power supply provider around the world.

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packing & shipping :

Note:

♥ Small order is acceptable.

♥ Welcome sample order to test our quality.

♥ More you order,better discount you will get.