Dell venue 11 pro 7140 won't turn on. There is a buzz. Was…

Sorry about the issue you have,

1. Press and Hold Power key for 10 seconds to shutdown the laptop.

2. Unplug all external peripherals (Mouse, Keyboard, USB Flash Drive, External Disk) including charger.

3. Press and Hold Power Key for 60 seconds.

4. Wait for another 2 -3 minutes.

5. Connect the charger and switch ON the laptop.

Okay

Yes

Okay, switch ON the laptop, check if it works.

Okay, remove it from Dock

Do not connect charger

Press and hold power key for 10 seconds

wait for a minute and start again

Okay when you start the computer do you see Dell Logo on screen?

Okay. Allow me a moment.

May i know if you have tried starting laptop without connecting Charger or docking Station?

Okay, shutdown the laptop

Press and hold Volume up Key and press Power Button.

Tell me if you see display.

Now Volume Up

Okay when you press Volume Down key and Power Button, you see Amber, Green, while series of color on display?

Okay do the same again and keep it aside for a while. Its self diagnostics mode check if you see Dell Logo. This may take 3 = 5 minutes of time.

Okay wait when screen is off for another 2 minutes and check if Dell Logo Comes on Screen.

When you connect the charger to laptop, do you see charge light glowing on Laptop?

Okay, we tried most of the options to get into Diagnostic mode for Dell Tablet unfortunately none of them worked. It seems like Dell Tablet may need physically checked by hardware technician.

In my opinion, you need to completely drain the laptop from battery and CMOS and then try again to check if you are able to boot the tablet.

To do that you will have to disconnect the battery and CMOS inside the tablet. Its best to consult Hardware Technician to perform such task.

Allow me a moment to confirm this.

Sorry again for delay in reply, I am not sure about the hole below volume key that could be for Microphone as there is no mentioned for Reset Switch on Dell Guide.

You need to disconnect CMOS from the board as well.

Just for your reference please check below link.

https://youtu.be/5MNvxmcI8h0

Just for your reference please check the link i shared, it will give you an idea. Please take help from hardware technician if you find it difficult as it may affect or damage the hardware.

Step you need to follow

1. Removed Back Cover

2. Disconnected main battery

3. Disconnected CMOS battery (Little connector be careful not to break it)

4. Press and hold Power Button (For 60 seconds incase anything needed to discharge)

5. Reassemble

Do let me know if you have any questions.

either of those. If in case if you found the hard disk error in diagnostics then it would be hard drive.

The diagnostics will take some time, if it comes up with hard disk error then you need to replace the disk on laptop.

I understand, you need to check hardware store for the disk.

If on diagnostics it didn't find any errors, please visit the same link i shared you earlier and look at the last part to reset BIOS to default. check if that works.

Let me know if you have any questions.

As removed CMOS and Battery it have reset the BIOS as well. please visit the link i shared, look at the last part for BIOS default settings and check if that works,