I am in the middle of attempting to repair the lcd screen on my PSR-3000. The right quarter of the screen became jumbled a couple of months ago and then the next quarter scrambled about a month ago. I've been using an external display in the meantime. Since I just finished a huge gig, I thought it'd be a good opportunity to try the repair.
I managed to do a teardown in about an hour, labeling all connections with masking tape and letters as well as taking photos along the way (I will try to attach them to this post.)
Once I got the LCD out, I took photos of it and sent those pictures to the ebay vendor in China showing a MC57T02E for sale. The connector does look different in the ebay posting, but I figured I'd contact them to get advice. The good news is that they sent photos to me of the actual product they ship, and it looks like a perfect match. I was able to negotiate $185, including shipping. I will attach their photos to this message, too.
I'm hoping to receive the replacement in the next week or so, and then I will post an update here about the repair. A $185 repair sure is much better than the $600-800 that I read Yamaha wants to repair it.
My plan is to repair the keyboard then sell it. Between my last gig and the selling price, I should be able to move to a PSR-S910. Hopefully the LCDs in the S910 are different and no longer faulty.