PICTURE STARTS GREAT THEN AFTER A FEW SECS IT STARTS TO SHAKE,ON A NORMAL VCR IT WOULD BE THE TRACKING,BUT THIS HAS NO TRACKING TO ADJUST,PS THE SOUND IS PERFECT,ONLY BOUGHT THIS AT A BOOT SALE TODAY ,I WILL BUY A HEAD CLEANER TOMOR,THAT MAY HELP,ANY SUGESTIONS ?

Normally the tracking control is on the remote control. Some models do use the up & down channel selectors on either the remote or the front panel of the VCR. If you don't have the remote, the best way to test if it is these controls on the front panel, is to start a video playing a hold down the up or down key and watch to see what happens. If they operate the tracking, the tracking should go way off (do it on a video that is tracking well when first playing).
PS don't forget to clean the video head every so often (Servisol video 40 spray is best for that).

Likely capstan motor and/or pinch roller worn. Probably more than new VCR.

the rolling picture is sync problem.
if the problem is in the VCR, it can be adjusted. if you don't know how to do it, then yu should bring it a repair shop.
if it in the DVD, then the cost can be high. (replacement of the DVD reader)

All new VCR's are auto tracking however, you should be able to manually track it using your remote, or there are a few reasons that the auto track can fail, the tape may have worn or ragged edges which means that the control head cannot get a clean reading, the control head may itself need cleaning or the tape path requires adjustments, adjusting the guides really needs to be done by a technician as a reference tape is used, or that the heads are low and a good video signal cannot be obtained to gain a reference point....Phil

This unit needs its tracking circuits aligned, starting with the mechanical adjustments of the transport....accordianman

try cleaning the heads with a head cleaner or even a high grade blank tape letting it play for 20 mins.
hope it helps
wg

needs tape path alignment or cleaning done

This type of problem may be caused by a dirty video head, people some time try to adjust tracking to take care of this problem this is a mistake. Now to clear up this issue first you put the tracking control mid way in its setting, then you clean the heads of the VCR you can use a head cleaning tape (follow the instructions on the cleaning tape box)for this or if you have experience you use a chamois swab type cleaner (follow the instructions on the package of swabs and liquid cleaner). one the heads are cleaned you acn then try to adjust track to obtain the best picture. If you can not you may have video head problems or a problem in the drum motor (servo) mechanism. In which case I advise taking the unit to a TV repair shop.

It sounds like the back tension is off on the unit. the back tension is controled by a small band attached to a copper or metal strip and that ia wraped around the supply reel and is adjust by an arm that swings out and contacts the tape during record or playback and keeps a steady tension on the tape. If the back tension band breaks or wears out you will get a picture that looks like the tracking is off or bad or dirty video heads. Most likly you do not have a backtension gauge and it certainly would not be fesable for you to purchace one as a good one cost about 100 bucks or so. A repair shop may beable to adjust it for you, But even their fee may be cost prohibitive. Good Luck PS please do not forget to rate this.