asus gx 1008B V3 switch

Can some one tell me the correct power supply for this unit? Purchased online locally and supplied with a power supply. Unit quit working after about 30 minutes. The power supply was quite warm. The specs call for 9V at 500 ma. The guy supplied with a 9V 200 ma, positive on the pin. I'm wondering if the polarity is at least correct. I know the PS given is under rated by less than half. Of course the a$%^&* won't stand behind his sale.

All searches turn up 9V, 500ma but none show the polarity.

TIA

 

The power supply should be DC 9V/0.5A. As you rightly posted, 200mA is less than half of the required amperage. If the polarity was switched, the device would not have worked at all.

http://www.newegg.com/Product/Product.aspx?Item=N82E16833320045

 

What I was worried about was wrong polarity which might ruin the switch. It did work however. I have another old supply which is 450 ma from a phone but I have to change the connector and reverse the polarity.

Thanks

 

OK switched to the other power supply from my junk box and the Ethernet switch is working. This supply is still slightly under rated but will see how this works going forward.