I have sl1200 mk2,the little lightstick dont light when its up?

There would be no way to service your unit, if you live in remote area. There are too many ICs to just guess at one. Anything from a drive ic to a microprocessor(computer inside your technics). You need to be highly tehnical to repair this. Sorry.

I have seen this problem many times.
Option 1:
If you are comfortable with soldering, try replacing the drive IC. This solves the problem 90% of the time. The part number is: AN6675 . This is a discontinued part so you may have to search around a bit, but you can usually find one of them on eBay for between $25 - $40. There are a few newer versions of the chip that are suggested as replacements, but most of them have been on back order for years and you could end up waiting forever. I'd stick with the OEM part number on eBay. Just be sure it is in stock before you buy.
Option 2:
If you are not comfortable with delicate soldering or want a fix that is easy and 100% sure to work, I suggest replacing the whole motor board. This may sound extreme but it's really not. These are discontinued as well, but are usually easy to find on eBay. I've purchased many of these for less than $115. That may seem expensive at first, but it is still way cheaper than the $300 - $400 price a repair shop will charge. Be sure to purchase from a reputable seller with good history and, be sure that it is in good working order. Some are not, so carefully check the description. Some may look a little different than yours due to minor changes over the years, but as long as it is listed as compatible with the MK2 series, it will work fine. This is the most fool proof option if you don't mind the price. Like I said before, it is super easy and always works.

If anyone else is having trouble with a Technics SL1200/1210 MK2, this link is a must have:
www.deckdoctor.com.au/TECHNIC%20SL1200%20PCB.pdf
http://www.deckdoctor.com.au/TECHNIC%20SL1200%20PCB.pdf
I used this page again and again to save time identifying problems. Extremely useful. Good luck. EW

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

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

ability to switch between 110 and 220 voltages. is it set at the wrong setting to power on? why did you need to replace inside wires? maybe something was touching inside and has blown the fuse. see legitimate repair shop.

Being the older model, the chances are that the drive belt on the Mk2 turntable has got worn and shiny with use. It may also have stretched a bit. If you are using the tables for 'scratching', the fact that you are holding onto the turntable when the motor is running is placing a strain on the belt that it is not really designed for. I would recommend changing the belt - you can easily find spare belts for sale on the internet

Check anti skate and tracking weight, [email protected]

Basically you dont.
You will need to replace the power knob which comes complete with the brass rod that goes through the strobe housing. To do this you will need to remove the base of the deck - be carefull not to lose the spring and ballbearing.

http://cgi.ebay.co.uk/TECHNICS-POWER-KNOB-SL1200-SL1210-MK2-GENUINE-NEW-PART-/300442767389?cmd=ViewItem&pt=UK_AudioTVElectronics_HomeAudioHiFi_Turntables&hash=item45f3c8d01d

Usually just the knob, look here :-
http://cgi.ebay.co.uk/TECHNICS-POWER-KNOB-SL1200-SL1210-MK2-GENUINE-NEW-PART-/300442767389?cmd=ViewItem&pt=UK_AudioTVElectronics_HomeAudioHiFi_Turntables&hash=item45f3c8d01d

Ed try spraying some contact spray directly in to the Buttons,push one then the other you will feel them free up Please rate my performance ttech