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Dies it shut down completely when you hold down the power button? If it does however you shut it down do it. Leave it sitting for about 10-15 minutes and try turning it on. If that doesn't work just re format it or re boot it
You should reset the router. Just unplug the power for about one minute and then reinsert the plug. It will take again about one minute before the router comes back. but after that it should work again. Unplugging, will clear the memory from a lot of clutter, but the settings will be saved.
Eventually you can reset the tablet too. You have to make sure you did install the WiFi settings correct on your tablet.
Try wiggling the recharging cable (when it's plugged into the unit) or pop out the memory card if you've added on. I bought one (big mistake)- the recharging cable part that sticks into the usb port on the unit is so sloppy loose I have to prop it so it doesn't fall out from any vibrations..
If this is under warranty take it back. If it isn't power the unit on with just the battery powering the unit. When you see the Windows splash screen drop the battery out after the screen goes black put the battery back in and press the power button. This should bring up the on screen menu telling you it failed to start or shut down correctly. Select, Boot in Safe Mode and see if the system will power on. If that fails you need to do a system restore. To access system restore options power the unit on and press and hold the F10 key, this will bring up the restore Windows options. From that menu select to restore your operating system. If that fails you will have to do a complete restore to factory default settings. If that fails you will have to replace the hard drive.
Take a microSD card out of the slot. (Empty the microSD card slot.)
Press and hold down the power button for a few seconds while pressing and holding down the "Home" (Silver Push Button) button. (Both "Power" and "Home" buttons must be pressed down until he see the phrase "upgrade system activated" in the middle of the screen.
Release both buttons once the phrase "upgrade system activated" appears on the screen.
Wait until it reboots. You will see the following sentences on the left top corner of the screen: Can not find any update image. Press MENU/KEY_VOLUMEUP key to init SD card, Press BACK/KEY_VOLUMEDOWN key to cancel.
Press the "VOLUME UP" key. The volume up key is located at the left side of the unit and the button is closer to the built-in camera than the volume down button.
Wait until it finishes making a partition and shut down the system automatically.
Once the unit is turned off, your system will be reset to the factory settings. Thus, your previous data are lost at this point.
Is there any chance the video output is switched to feed the rear VGA connector? ie the screen is black due the video being routed away from the screen. Try hitting F5 key. Can you hit the Delete key to try and enter the bIOS screen? (it may be another key such as F1 or F2. See your Toughbook manual) Can you have someone make you a bootable USB thumb drive and try booting up with that? Its also possible that the hard drive has failed, but usually the BIOS POST check will initiate and indicate a failed hard drive or bad RAM etc Can you remove the 2.5 inch hard drive? Usually its accessible under a removable panel under the laptop. Feel free to ask more questions. Cheers, Steve PS have you tried the discussion forums on the Panasonic website?
I worked on one of these a few months back, it about drove me the nuthouse!!!!!!! after some long hours of going over every chip and connection in that laptop, and by now a couple more gray hairs, I started my search for help. It turns out there was a class action law suit for this product (not sure now on date) but I'm sure of the M35X. There is a issue with stress fractures in the motherboard, along with a couple of bad soldering connections on the board as well. This one I was working on was so strange it even started to boot as I had the HD half way out of the machine and no battery!!! Sounds like you need a new board, sorry! Just make sure if you do, get a good warranty and extend it!