Just got a dell venue 11 pro 7140 and did a clean install of all the latest drivers and bios as per the website. Getting this issue where when the tablet goes to sleep and after a while of inactivity, it will not longer power back up. No response from power button or windows logo. Only solution so far has been for me to disconnect the battery and then everything resets.
I'm getting the following errors in eventviewer from what i presume is before the crash
ACPI Error. Event ID 13
The embedded controller (EC) did not respond within the specified timeout period. This may indicate that there is an error in the EC hardware or firmware or that the BIOS is accessing the EC incorrectly. You should check with your computer manufacturer for an upgraded BIOS. In some situations, this error may cause the computer to function incorrectly.
When the issued first came up the tablet felt really warm like it was still draining battery but wont charge. Nothing responded until i disconnected the battery.
Did you disable connected standby in registry?
I had this problem yesterday after disabling connected standby. The tablet went into sleep and there was no way to get it back on. Fixed it by removing the back and disconnecting the battery.
After enabling connected standby everything was fine again.
I was using newest BIOS A07
looks like it is enabled already. the tablet can go to sleep and wake up fine, it just when it sleeps for a while that everything freezes,maybe 2hours?
I'm having the same (or similar) problem.
I've had my 7140 for a few weeks, and it has operated reliably.
I recently disabled connected standby and installed BIOS A7.
Just now, the screen went dark unexpectedly. I cannot get it back. If I hold down the power button for around 20 sec, then release it, then hold it down again, the tablet vibrates after a few seconds, but the screen stays dark. If tap the windows button, I immediately get a short vibration. I can do this repeatedly, and I get a short vibration each time, but the screen remains dark.
Perfectly reproducible for me..
BIOS A07 and Connected Standby Off
(HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power set to 0)
After entering sleep state either by choosing sleep from charms or pressing power button there is no way to get the tablet turn on. Pressing the power button vibrates for a short time but nothing happens.
Screen test (Power button + volume low) works. The only way to get the tablet working again is to remove the back cover and disconnect the battery and/or disconnect the CMOS. Did not know what did the trick but I am not going to find out again
I'm not using hibernate.
My 7140 appears to be permanently bricked.
I have disconnected both the main battery (just disconnected the visible connector; do I need to remove the screws?) and the small round battery and left them disconnected for half a minute. When I reconnect the batteries, nothing I do will get the screen to turn on. I can get it into the state where it well vibrate momentarily every time i touch the Windows logo, but that's the only response I can get out of the device.
I have tried simultaneously pressing the power button and the volume-low button, but that apparently does nothing.
Does anyone have any idea what I could do to get my 7140 un-bricked?
I came back to my tablet after it had been sitting for a while, in what I thought was a bricked state, and it was displaying a pre-boot screen. Hitting the volume-up key allowed it to boot, after which it resumed as if it had been hibernating.
Note: I have never enabled hibernation. When I went into the registry to re-enable connected standby, I noticed that, in the same group of registry keys as CsEnabled, there is a key named HibernateEnabled, which is set to 1. I'm certain I have never touched it. Perhaps it is set in order to support fast boot?
After turning off connected standby, updating to BIOS A7, and turning connected standby back on, my 7140 developed an odd sleep/resume behavior. To resume from sleep, I had to hold the power button down until I felt vibration, then wait a few seconds, and then I would see the dell logo in a white circle, before it resumed - as if it were hibernating every time it went to sleep. This behavior persisted through a power-off/power-on cycle. Doing a restart (charms/settings/power/restart) appears to have restored it to near-instantaneous sleep and resume.
Anyway, I seem to have a functional 7140 again.