Brother lock wholesale serger 1034DX SEWING MACHINE

Product Name: Brother lock wholesale serger 1034DX SEWING MACHINE
Brother lock serger 1034DX SEWING MACHINE I have had this machine for about a year I started having issues with the perfect stitch out of nowhere, I have been told it is a timing issue while some say that it is easy to fix my loss is your gain. It is not running a 100% right now. Machine operates but believed to be timing. I did everything as instructed by a shop I changed needles thread needle plate and cleaned the machine and still couldn't get wholesale it to operate so again it could be a very minimal thing that I was doing wrong but I just don't have the time to mess with it any longer. I have a sewing machine box to ship it in as well Can ship asap, thank you!!.