PCNix fixed my 17" Acer about a year ago, when I thought there was no hope. Cost was a fraction of the amount quoted by a certain big store, all was clearly explained to me, and I took the opportunity to enhance the notebook by replacing the defective disk with an SSD and adding some memory. It's still blazing away with no problems.
A couple of months ago, my Lenovo died. It had never been very reliable and it needed a new mother board. In discussing with Amin and Careme, I decided to ditch the Lenova and they looked out for a reburbished notebook that would meet my needs for travelling. Because I was precise in what I wanted, it took a couple of weeks for a suitable gently-used Vostro to turn up, and it's an impressive performer. Cost: just a few dollars more than what it would have cost to replace the mother board in the Lenovo.
So, when my grandson's Acer went into a continuous repair loop this week, of course I went straight to PCNix. I had done a disk check and it highlighted many bad sectors. Amir's diagnosis was that it couldn't be repaired so he replaced it with a much better one. With the new SSD, It's noticeably faster than it used, and my grandson is going to be very pleased.
PCNix is certainly the best place to go. They genuinely care about providing the best service at the best cost, quickly, and they are very good at explaining what needs to be done and why, and discussing the pros and cons of alternatives. They're also very personable and likable people. I wouldn't even consider going elsewhere.