My tab stucked during start and its freeze in lenovo logo

Repeatedly tap the F1 key when the Lenovo, ThinkPad, ThinkStation, or ThinkCentre logo appears, The computer may beep once to indicate that it will boot to BIOS.

How to Enable Boot device List F12 Option The following example shows a system that has an option to enable or disable the Boot device List F12 Option.
Go into the BIOS to enable Boot device List F12 Option (option is usually under the Startup tab).

Hello.

How long has your Lenovo Tab been stuck on the Lenovo screen? If it has been a short while, it may be installing some updates. Unfortunately, it doesn't show an "updating" message and many people have mistaken it for a frozen screen. If it is updating, leave it alone for a while and it should finish itself and automatically reboot.

If it has been longer than usual (stuck for over 30 minutes), then you can try a hard reset. Hold down the power button and the volume up button for 5-10 seconds and the screen should go blank, restarting the device. You had mentioned that you had been unable to reboot it. I'm not sure if you had tried the hard reset. Also, just a disclaimer, interfering during an update could possibly brick your device, so be careful about it.

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Could be bad RAM, motherboard, hard drive, etc. Any beeps during startup? They would tell you what is wrong (with a Google search).

Please specify your problem in details. is it windows logo or motherboard logo.
If your PC freezes at Windows logo then its the problem of your operating system, try to repair it or have a fresh installation with a proper Windows bootable disc.

remove the small part of the back cover and press the reset button near the sim card slot.

Try with External USB Key board. To enter BIOS setup utility, press F2 when the Lenovo logo appears during starting up your computer.

Hope this helps to you....

It is also important to remove the suspicious applications and programs in the computer to avoid Windows freezing. In this type of infection not only your Windows registry gets corrupted and needs massive repair but also there is virus based penetration in the Windows set up. In this situation it is recommended to conduct a virus scan as well.However, if your Windows freezes up, the best solution is to repair the computer registry.use registry cleaner reg in out
computer restarting Click Start and Open the Control Panel 2. Go to System and Maintenance, Click on System. 3. Select Advanced System Settings and choose Advance tab. 4. Under Startup and Recovery, click on Settings. 5. Under System failure uncheck Automatically restart. Another cause for random reboots is that the computers processor is getting too hot. To check this, enter the computers bios during boot (usually by pressing Delete, F1 or F10 when the computer just starts) and there will be an option about the computers temperature (often under "PC Health"). U can have registry error.Run a registry cleaner reg in out

make sure the mouse and keyboard are in right connections...if you look closely youll see icons next to ports.
try without mouse at first start up ,load windows and use key with windows logo on it to access start and scroll to shutdown tab and restart...plug in the mouse before restart.
if logo tab isnt assigned press ctrl + esc to access start menu.