Power cord I need to replace the power cord. The new cord I've bought gives me a choice of positive or negative polarity. Which setting should I use? Thanks.

It's an ac cord. there is no positive and negative. the solid black side is "hot" and the ribbed or striped side is "neutral".

As long as the only thing damaged is the power cord, this should be easy. You said that you needed to know how to tell which side is positive and which is negative? The power cord carries alternating current not direct current. So in this case, polarity really isn't important. The same applies to the two yellow wires supplying the main motor board. They are A/C too. As long as the replacement cord you use is of equal or higher power handeling, and you make sure your connections are solid, it will work fine regardless of polarity. Just be sure the only problem is the cord. Check this link to be sure. Good luck, EW.
This link is a must have for anybody diagnosing a problem with a SL1200/1210. Take a look:
http://www.deckdoctor.com.au/TECHNIC%20SL1200%20PCB.pdf

I’m happy to help further over the phone at https://www.6ya.com/expert/erik_149c4c1c216e42f2

Hello
It is eay to replace the power capacitors. Just resolder them out from the board and solder a new one in place. Make sure the polarity of the capacitor. Electrolytic capacitors will have both +ve and -- Ve polarity. It will be marked both on the capacitor and printed circuit board. Normally --Ve markings can be seen on most capacitors. Coinside this marking to the marking at the printed circuit board. If the polarity reverses, the capacitor will explode as you switch ON the set.
See the negative (--Ve) marking.

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I have a ZOOM GX1XN and it doesn't like universal adapters much. Using one with the wrong voltage or polarity may permanently damage your pedal. Try to obtain a proper ZOOM AC adapter (part number AD-0006 or AD-16) if possible. These are dual voltage and will work equally well with both 220 and 110 volts. Failing that you need an adapter that will give a DC (direct current) output of 9 volts at 0.5amps - maximum 4.5 watts. The outer contact (sleeve) of the adapter needs to be positive (+ve) and the inside contact negative (-ve). Lots of universal adapters are the other way around with the sleeve being negative - but some have a multi-connector on the end with both positive and negative sleeves.

Hello.
You have bad capacitors on Power Supply board.
If you remove back cover you can locate power supply by tracing where is your power cord attached to. Bad capacitors have bulged tops instead of flat ones. They have to be removed from the board and replaced by new ones. Also important to position new ones with proper polarity (negative pin to negative or marked hole on the board.).
Best regards.
Russ.

Is it a oem NINTENDO power plug? Or is it one some guy said;" This one is it"! One thing you have to Make sure is that there happens to be different polarities. Meaning; sometimes the positive is in the center little hole and negative is on the outside. ( and vise versa) Take a look at that. Sone plugs, cords, and such will show you a small Icon that will show you the polarity. Good luck and hope that helps!

Mustek 600 III EP Plus scanner, Power adapter type output +15VDC/1A Positive Polarity (positive inside and negative outside).

This means your unit does not see the battery and is running on AC power only. You need to check and make sure that your battery polarity is correct making sure that positive goes to positive, and negative to negative. If you can attach some photos, that might help also.

Provided the laptop booted (albeit to requiring bios set up), all is well. The data such as time needs to be re-entered manually, because since the battery is required to maintain volatile memory, when the battery goes flat or is removed, the data is lost. Re-enter all data, including boot sequence (i.e. IDE 0, CD-ROM/DVD)! exit saving to CMOS. should reboot to OS.

here is an free 800 number you can call and ask the techs to make positive friend

Polaroid electronics
1-866-400-5168



Hope that fixya up there