Trying to track "power on" track for Kindle 7

Thanks for taking a look. I hadn't noticed the discolouration of the copper on PWR, I guess that was the original problem. I'll give the board a bit of a clean as well.

The bit that I've arrowed in red (and the one above it) are metal springs that press against the copper contacts that I've shown in blue. I think that's what gives them the appearance of a lifted pad but they look ok when looking at them live. Now that you've pointed me at that though I can see a track that looks like it goes from that spring to the discoloured PWR copper point (and no continuity). Testing it with power it appears that there is no power to the spring.

I think you've put me on to the right tack. I'll try that and let you know.

The discolored copper was the pad I was referring to. That trace was the one I was talking about when I said to scratch both sides lightly and solder a small jumper across the pad "discolored copper". You should have no trouble scratching through the green coated to fresh copper on both sides. That discolored area or pad (just so we're clear we are talking about the same thing) has to be repaired for your switch to work. No continuity means you've found your problem. At least the start of it anyway.

Let me know what happens good luck