Surface Pro 4 - Screen won't wake from sleep

More evidence that the no-wake issue is hardware.  I bought my SP4 back in January at Best Buy.  It had no-wake right after the February updates enabled S0 sleep.  Exchanged twice through Microsoft, and both replacements also had the no-wake issue.  That's after installing recovery images, running update over and over, and all the other "fixes" that online support suggest.

Recent travel took me near a Microsoft Store.  Told the staff that my third attempt to get a working SP4 had the no-wake problem, and they were happy to immediately replace it with a brand new lot 1615 machine.  Not a single no-wake error since - machine has been up for 8 days since last reboot with frequent sleep during the day and overnight.  All power settings at out of the box defaults.  The difference with all of the earlier machines is night and day.

Hi, Neil.

Thanks for the info on your experience.  It does not lead me to the same conclusion about hardware though since the replacement machine brought a new system image.

For compelling evidence that there is a relevant hardware difference one needs to install the same c:-drive image on two platforms and find clear evidence that one shows the problem and the other doesn't. To run this test and then return both systems to normal will usually take more than two hours.  My Microsoft Store in Tysons Virginia has been cooperative when I wanted to do that by allowing me to use a known-good platform.  This is a useful thing to try before wasting time on a replacement that may be the identical hardware you had the problem on.

I have not done that with this issue.  If someone has, I'd like to know.

Already done, read my posts. Lot 1613 SP4 works great, better in many ways than older SP4s. Identical image loaded on 3 SP4s. Older two display typical problems. Lot 1613 runs great. Better performance, better battery life--much, much better--so far no sleep or crash problems. Clearly, the older two have a hardware problem not shared by the new unit. Whether MS has changed something in the design, improved QC, or I just got lucky with the new one I have no idea.

I bought my Pro4 15 April. It started out fine. Issue with pen resolved with update, but now have more frequent issues. Screen 30% of time displays text as pixels, 15% of time does not wake from sleep and doea not have 100% functionality in tablet mode. I'm disappointed and while at first I recommended it, now when someone inquires I explain the issues I had that day. Disappointed.

My first Surface Pro 4 I returned within 2 weeks of purchase as the battery would go dead even in the off position.  I thought the battery would not hold a charge.  The tablet was replaced and within 3 weeks, the same thing occurred with the new one.  I recharged the battery and assumed it wouldn't boot up.  After holding down the power key for 30 seconds, releasing it and then trying to start it, it booted fine.  Unfortunately the problem continues that the battery goes dead even in the off position.  Interestingly enough, I also correlated a 3 gb loss of data on my wireless internet the last time it did this.  I'm assuming that the tablet is doing updates automatically, draining the battery and of course draining a significant amount of data on my limited wireless internet.  Any thoughts or discussion??