New power adapter dead after one charge cycle

hi guys.....
my power supply went a week or so ago... started to turn on and off then stopped completely...
i bought a new apple A1021 as an exact replacement to the previous...
plugged it in and got amber led then charged through to green and all functionality was as normal... problem sorted.... or so i thought....
came to it the next morning to find no led on.... so i checked fuse and swapped lead etc but no response....
phoned apple store mac docs whose answer was 'ummm i don't really know try resetting the pmu' which i have done but still no luck....
so my questions to you are:
1. is the new power supply faulty?
2. is there a problem with something shorting / feeding back into the power supply.... frying it?
3. is there an internal fault preventing charge / power? (although it did charge once)
4. a friend said it could be a faulty battery?
i don't know if you have come across this before but any help or suggestions would be greatly appretiated.... thanks

You may need to download and install the SMC firmware update:
http://support.apple.com/kb/DL1312?viewlocale=en_US

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New power adapter and battery, still not working?!

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A, I love Alexia Potatoes--I think I'm having some garlic mashed with dinner tonight.
B, Have you downloaded and applied this firmware update?
http://support.apple.com/kb/DL1311
Before you do so, you may want to try just a plain old SMC reset:
http://support.apple.com/kb/ht3964
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Okay, this is going to be kind of long, I apologize.
So, I have a Macbook Pro that is a few years old (it's the last model to have the one button). Recently, by original power cord got frayed and stopped functioning, so I got a new one. I got the new L-shaped adapter and I started having issues. If I unplug it and plug it back in a few minutes later, it doesn't recognize that it's plugged in. But, if I shut down the computer and take out the battery and put it back in, it will start working until I unplug it again for an extended period of time. The cord works fine in my sisters computer, it's not a battery issue(got a new one after this problem), I reset the SMC, so the next thing on my list to check is the logic board. But then something occurred to me that I should have thought of earlier. What are the odds that my logic board will fail exactly the same time I bought a new power adapter? I think there is something different about the power adapter that is causing issues the SMC or something. Is this what's going on? Are there other reports of this happening? Is there going to be an SMC update to fix this?

The new adapter with the angled plug doesn't work with older (pre-unibody) MBPs. If I were you, I would return or exchange it for one of the older ones with a straight plug. If you can't exchange it where you bought it, ask for a refund, and buy a new or refurbished adapter from one of these vendors:
http://eshop.macsales.com/item/Apple/A1290AR/
http://macbookadapter.com/85wcompare.html
The first is a highly dependable Mac-centric vendor with whom many regular posters here have dealt often and happily, including myself. The second is a vendor I've never dealt with and can't vouch for. I mention them only because they advertise old-style MagSafe adapters both new and refurbished. Before ordering from either of these or any other vendor, telephone them and confirm that the older style is available and will be supplied to you if you order.
Message was edited by: eww

New power adapter for old macbook - It doesn't work!

Hello!
My MacBook is 3 years old. My power adapter got broken at the end where you put it into the socket.
Now I bought a new power adapter. The adapters have changed now. The end where you put it into the computer looks now a little bit different. But they told me in the Apple Store that it will also fit my 3 years old Macbook.
At home it really fit my Macbook but it didn't charge. Nothing happened, no light. How can that be? Then I combined the two, the end for the socket of the new power adapter and the other part where you put it into the computer of my old power adapter. Now it charges. So is the problem after all the part where you put it into the computer of the new power adapter that looks different now?
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Sorry for my bad English.
xenchen
Message was edited by: xenchen

You may need to download and install the SMC firmware update:
http://support.apple.com/kb/DL1312?viewlocale=en_US

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https://www.dropbox.com/s/qcrk4fl5bhftbzm/IMG_20131220_215821_454.jpg
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I recommend you to purchase the AC adaptor recommended by Toshiba.

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Device name:          ASMB016
Pack Lot Code:          0002
PCB Lot Code:          0000
Firmware Version:          102a
Hardware Revision:          0500
Cell Revision:          0102
Charge Information:
Charge remaining (mAh):          0
Fully charged:          No
Charging:          No
Full charge capacity (mAh):          0
Health Information:
Cycle count:          1128
Condition:          Replace Now
Battery Installed:          Yes
Amperage (mA):          0
Voltage (mV):          9596
System Power Settings:
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System Sleep Timer (Minutes):          0
Disk Sleep Timer (Minutes):          10
Display Sleep Timer (Minutes):          15
Automatic Restart On Power Loss:          No
Wake On AC Change:          No
Wake On Clamshell Open:          Yes
Wake On LAN:          No
Current Power Source:          Yes
Display Sleep Uses Dim:          Yes
Battery Power:
System Sleep Timer (Minutes):          15
Disk Sleep Timer (Minutes):          10
Display Sleep Timer (Minutes):          2
Wake On AC Change:          No
Wake On Clamshell Open:          Yes
Display Sleep Uses Dim:          Yes
Reduce Brightness:          Yes
Hardware Configuration:
UPS Installed:          No
AC Charger Information:
Connected:          Yes
ID:          0x0100
Wattage (W):          60
Revision:          0x0000
Family:          0x00ba
Serial Number:
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My power adapter for my mac stopped working recently and as far as I know I didn't cause any damage to it myself.
I read the following on the apple website:
Additional Information
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New power adapter dead after one charge cycle

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