[Galaxy Tab 10.1 Q&A, Help & Troubleshooting] OTAw:
Although I have yet to figure this issue out, I'll provide my experience and thoughts on it, as well as addressing your questions.

Firstly, the background with my tablets.

I bought 2 broken galaxy 10.1 tabs (p7510) in the past on eBay and they both needed screen repairs. The one I bought for myself a couple of months ago needed a new digitizer and LCD screen, and since I'm knowledgeable on replacing screens/hardware on smartphones, I was able to successfully replace and fix what is now my personal tablet.

The other one I've purchased within the last couple of weeks, to fix up for my uncle. The issue with this tablet (as claimed) was that there was no display picture. In the eBay listing photo, there was no damage to the tablet's digitizer so I figured there'd be no physical damage to the LCD, which turned out to be correct.

I'm unsure if you're suffering from the exact same issues, but upon receiving the device, before opening it, I got an in-and-out picture within an hour or so of really playing with it. So I was able to confirm no screen issues physically and moved on to my next hunch; the LCD flex cable is loose or bad.

I then began to open up the tablet and remove the LCD cable from the broken device and temporarily swap it with the one from my working device. Same issue. The screen would temporarily come in clear then start jumping around and scramble the picture as well as the screen colors. So it's confirmed not a faulty LCD cable like initially thought.

Wiggling the cable seems to have a secondary effect on the issue, or "propping up" the cable. But the picture eventually goes in and out again or starts jumping around/changing colors.

There are countless people with this issue from what I've researched and it seems none of them have found the specific issue on what is causing this. It seems the majority of people simply send their devices in to be repaired, well the ones still under warranty.

I've read a theory that there may be an LCD/motherboard related component that temporarily overheats, thus causing this issue.

I haven't gotten as far as removing the digitizer to get to the LCD to test, because I don't own a heat gun and the hairdryer route takes so long. So until I make time to do so, and swap with my personal tablet, I would diagnose the problem to be an LCD related issue.

So here's where I answer your questions in chronological order:

1. No, do NOT spend the $200 to get the device fixed. Used, working tablets are going for less than that on eBay!

2. Working on it currently...

3. Yes, just do some research on the anatomy of this device. There are countless guides to watch/read and repairs become easy once you understand what you're doing.

If I do find that it turns out to be a bad LCD screen issue, and you're willing to make the repair on your own, LCD screens go for as low as $54 on eBay. That's where I personally buy mostly all of my hardware replacements and they do work great (i get the best prices there, too!).

I've attached some pics to this post as I was able to replicate your problem. My personal working tablet is on the bottom in the casing as the broken one is on the top. I'll get back to this thread when I open up both of my tablets digitizers to swap and test the LCD.

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